"What time is it? Where are we?" Mark asked drowsily.

"Near midnight, and we are at Gunjyal," answered Tom.

"What a beastly hour to turn out!" grumbled Mark as he scrambled down.

In half an hour the servants and a camel--which had been waiting--had started for the Doctor's destination, a place on the Salt Range some twelve miles away.

At daybreak three horses arrived, and the Doctor and his two companions started for their camp.

After breakfast the Doctor took his son and Tom Ellison, accompanied by a servant, to a small valley about a quarter of a mile from the camp.

"Here you are," said the Doctor; "this is the exact spot where I found the pieces of slab."

"Then I should say the rest can't be far away," remarked Tom, and they commenced poking around with the ends of iron-shod sticks. They had been twenty minutes at their task when a boy in charge of some goats planted himself on a rock not far away and keenly watched the Sahibs at work.

"Don't you think it would be a good plan, Doctor, if we got a few coolies to loosen the subsoil and turn over some of these loose stones about here?--it would be easier for us to search," suggested Tom.

"Yes, we may as well make a thorough search now we are at it," replied the Doctor, who at once sent the servant to the village near the camp for some coolies and tools.

The boy had disappeared before the coolies arrived, for he had received a signal from a man who was secretly watching the search-party from the top of a cliff some seventy yards away.

The natives had not been long at work when one of them slipped, and his puggari pitched off exactly on to the spot where the next coolie had turned over a stone. The man picked up his puggari and moved a few yards off to wind it round his head again, and almost immediately the goat-boy appeared and asked him if he had seen a stray goat.

Tom Ellison happened to be standing up examining a strange fossil he had found, and as he casually glanced at the boy he saw the coolie hand him something, which he promptly hid in the folds of a kind of scarf hanging over his shoulder.

In a moment a suspicion flashed into Tom's mind, and he rushed forward and seized the boy before he could make off, and no sooner had he felt the lad's kupra (cloth) than he discovered that the youngster had hidden a newly found piece of the slab which had been picked up by the coolie.

The Doctor and Mark were at once by Tom's side examining the fragment and listening to Tom's explanation. In their excitement they forgot about the boy, and when they looked round became aware that both he and the coolie had disappeared.

The sides of the hills all about were covered with low shrubs, large stones, and nullahs, or ravines, and, although a quick search was made, neither man nor boy could be seen.

When the day was over they had met with no further success as regards finding parts of the slab, but they took away several other stones which they thought might possibly prove to be of some interest, and most of the evening after dinner was spent in discussing the reason which prompted the theft from the Museum, and the attempt to steal the stone found during the day.

"There can be no doubt I was seen examining the fragments I found," said the Doctor. "I remember now that three or four natives were watching me trying to place the several pieces together in my attempts to get an idea of the whole. Strange that these natives should take so keen an interest in an old, broken slab, for the pieces must have been lying there for years."

"I expect we shall have to keep a sharp eye on this piece, for they are sure to have a try for it, judging by what they have already done," said Tom.

"They seem to have a sharp eye on us. I shouldn't be surprised if they thought we came here purposely to hunt for the stones," said Mark.

"Well, I will take a copy of the letters on it at once, in case anything happens to the stone," said the Doctor.

Next day an official letter arrived which necessitated either the Doctor or Tom returning to Lah.o.r.e for a few hours, and it was decided the letter should go.

"Now listen," said the Doctor as Tom was about to start on his journey.

"Take the stone to the Museum and tell them to place it where they can watch any one who takes any peculiar interest in it. Further, get a description of those men who were fighting there on the day the stones were stolen; and don't forget to post my letter to the Professor, for it contains a rubbing from the last piece."

With these parting instructions Tom started on his ride to Gunjyal station so as to arrive there before dark, there being practically no road from the foot of the Salt Range across the miles of dismal tract of sandy plain to the station, although his train did not leave until midnight; but it was the only train in the twenty-four hours.

Tom was half-asleep when he got into the train; he had the compartment to himself, and he thought it likely he would remain alone until he arrived at Lala Musa, about eight o'clock, where he would have to change to get on to the main line, so he quickly spread his bedding, and, drawing the green-baize shade over the lamp, he was soon asleep.

He could not say where it happened, but when he roused up the train was in motion and he was just conscious he was not alone; but the instant he attempted to move, a rug was thrown over his face, and he knew he was being held down by at least two powerful a.s.sailants. In a very short time, notwithstanding his fierce struggles, he was bound hand and foot, a gag in his mouth, and blindfolded, without having the slightest idea of the appearance of those who had attacked him.

Whilst Tom was in this condition the train stopped several times, but no one entered the compartment, and, as the Venetian shutters were down, it was impossible for any one to peer through the window and so become aware of his position.

He tried to knock his feet against the side of the carriage at the first station, but he was bound too securely to the seat which formed his bed to allow of the slightest movement, so wearily and painfully the hours dragged on until the guard discovered him and set him free at Lala Musa station.

The moment he was released he found that the only thing missing was the fragment of slab he was to have taken to the Museum.

"They followed me to Gunjyal and then slipped into my carriage at some station whilst I was asleep, and quietly slipped out at the next station when they had got what they wanted," mused Tom.

By the time he had given an account of what had happened to him he had only a few minutes in which to rush over to the refreshment-room and get some breakfast before his train was due.

When Tom arrived in Lah.o.r.e he went straight to his office, and in a couple of hours he had completed the special work which had necessitated his journey; then he went over to the Museum.

"The thief has been caught, Sahib," said one of the attendants as Tom entered the building.

"When? Who is he?" asked Tom, in considerable surprise, for he had concluded that his late a.s.sailants were the men who had robbed the Museum.

"They caught him during last night, but I don't know much about it yet,"

replied the man.

Tom at once hurried off to the police-station to learn full particulars.

"Yes, we found a piece of stone with some strange device on it," said the Superintendent of Police. "This is it. Do you recognise it?" he added, as he handed Tom the stone.

"No, this is not the one the Doctor found," said Tom, after a moment's examination.

"Well, it is the only bit we got, and we are told it was stolen from the Museum with some others, during a fight," said the officer.

"How did you get this?" asked Tom.

"Well, in rather a strange way. The night after the stones had disappeared three clever burglaries took place in Lah.o.r.e, and the thieves made valuable hauls in each case, but we could get no clue. Last night an anonymous letter came to us, and we decided to act upon it, so we searched a house in the bazaar and recovered this stone together with some gold and silver ornaments which had been stolen; we found them in the exact spot where we were told to look for them. The man says he is innocent, and that they were placed where we found them unknown to him.

Now you know the whole case," said the police-officer.

"And the man you have arrested, do you think he is connected with the men who were fighting in the Museum?" asked Tom.

"He says not. He certainly is not one of the fighters. He does not bear the best of characters, however," was the reply.

Tom related what had happened to him in the train; several theories were advanced to account for the keen interest taken in the stones, and the police began exerting themselves to fathom the mystery.

The morning after Tom Ellison had left the camp a shikari went to Mark with the information that some oorial (wild sheep) were feeding about half a mile away, and Mark, who was a keen sportsman, promptly got his rifle and went with the shikari.

Mark was able to get a long shot, but missed, so sat down while the shikari climbed the peaks around to try and find the oorial again. In about ten minutes Mark heard a slight rustling in the bushes some twenty yards away, and he got a glimpse of a porcupine. He did not wish to fire at it lest he should startle the oorial if they had halted anywhere near, so he picked up a stone and threw it at the animal when next he saw it.

"I have hit it," he muttered, as he heard a peculiar cry, and he hurried forward, but he could find no sign of the porcupine, and he concluded it had entered a small cave he discovered.

Mark struck a match and went in a few feet, but it appeared to be very low, and when his match went out he decided to go no farther, for he had no desire to stumble on the top of a porcupine.