"Oh, please, don't make that hooting noise," she appealed to her brother. "I'm writing----"

"Don't be afraid," said Hamilton, "it was only Bones singing. Do it again, Bones, Pat didn't hear you."

Bones stood erect, his hand to his white helmet.

"Come aboard, my lady," he said.

"I won't keep you a minute, Bones," said the girl, and disappeared into the house.

"What are you doing this morning?" asked Hamilton, gazing with pardonable curiosity at the box and drawing-board.

"Polishin' up my military studies with Miss Hamilton's kind a.s.sistance--botany and applied science, sir," said Bones briskly. "Field fortifications, judgin' distance, strategy, Bomongo grammar, field cookery an' tropical medicines."

"What has poor little making-up-company-accounts done?" asked Hamilton, and Bones blushed.

"Dear old officer," he begged, "I'll tackle that little job as soon as I get back. I tried to do 'em this mornin' an was four dollars out--it's the regimental cash account that's wrong. People come in and out helpin'

themselves, and I positively can't keep track of the money."

"As I'm the only person with the key of the regimental cash-box, I suppose you mean----?"

Bones raised his hand.

"I make no accusations, dear old feller--it's a painful subject. We all have those jolly old moments of temptation. I tackle the accounts to-night, sir. You mustn't forget that I've a temperament. I'm not like you dear old wooden-heads----"

"Oh, shut up," said the weary Hamilton. "So long as you're going to do a bit of study, it's all right."

"Now, Bones," said Patricia, appearing on the scene, "have you got the sandwiches?"

Bones made terrifying and warning grimaces.

"Have you got the board to lay the cloth and the paper to cover it, and the chocolates and the cold tea?"

Bones frowned, and jerked his head in an agony of warning.

"Come on, then," said the unconscious betrayer of Lieutenant Tibbetts.

"Good-bye, dear."

"Why 'good-bye,' dear old Hamilton's sister?" asked Bones.

She looked at him scornfully and led the way.

"Don't forget the field fortifications," called Hamilton after them; "they eat nicely between slices of strategy."

The sun was casting long shadows eastward when they returned. They had not far to come, for the place they had chosen for their picnic was well within the Residency reservation, but Bones had been describing on his way back one of the remarkable powers he possessed, namely, his ability to drag the truth from reluctant and culpable natives. And every time he desired to emphasize the point he would stop, lower all his impedimenta to the ground, cluttering up the landscape with picnic-box, drawing-board, sketching-blocks and the numerous bunches of wild flowers he had culled at her request, and press his argument with much palm-punching.

He stopped for the last time on the very edge of the barrack square, put down his cargo and proceeded to demolish the doubt she had unwarily expressed.

"That's where you've got an altogether erroneous view of me, dear old sister," he said triumphantly. "I'm known up an' down the river as the one man that you can't deceive. Go up and ask the Bomongo, drop in on the Isisi, speak to the Akasava, an' what will they say? They'll say, 'No, ma'am, there's no flies on jolly old Bones--not on your life, Harriet!'"

"Then they would be very impertinent," smiled Pat.

"Ask Sanders (G.o.d bless him!). Ask Ham. Ask----" he was going on enthusiastically.

"Are you going to camp here, or are you coming in?" she challenged.

Bones gathered up his belongings, never ceasing to talk.

"Fellers like me, dear young friend, make the Empire--paint the whole bally thing red, white an' blue--'unhonoured an' unsung, until the curtain's rung, the boys that made the Empire and the Navy.'"

"Bones, you promised you wouldn't sing," she said reproachfully; "and, besides, you're not in the navy."

"That doesn't affect the argument," protested Bones, and was rapidly shedding his equipment in preparation for another discourse, when she walked on towards Sanders who had come across the square to meet them.

Bones made a dive at the articles he had dropped, and came prancing (no other word describes his erratic run) up to Sanders.

"I've just been telling Miss Hamilton, sir and Excellency, that n.o.body can find things that old Bones--you'll remember, sir, the episode of your lost pyjama legs. Who found 'em?"

"You did," said Sanders; "they were sent home in your washing. Talking about finding things, read this."

He handed a telegraph form to the young man, and Bones, peering into the message until his nose almost touched the paper, read--

"Very urgent. Clear the line. Administration.

"To Sanders, Commission River Territories. Message begins. Belgian Congo Government reports from Leopoldville, Bacteriological Expedition carriers raided on edge of your territory by Inner N'gombi people, all stores looted including case of 20 culture tubes. Stop. As all these cultures are of virulent diseases, inoculate Inner N'gombi until intact tubes recovered. Message ends."

Bones read it twice, and his face took on an appearance which indicated something between great pain and intense vacancy. It was intended to convey to the observer the fact that Bones was thinking deeply and rapidly, and that he had banished from his mind all the frivolities of life.

"I understand, sir--you wish me to go to the dear old Congo Government and apologize--I shall be ready in ten minutes."

"What I really want you to do," said Sanders patiently, "is to take the _Wiggle_ up stream and get that box."

"I quite understand, sir," said Bones, nodding his head. "To-day is the 8th, to-morrow is the 9th--the box shall be in your hands on the 15th by half-past seven in the evening, dear old sir."

He saluted and turned a baleful glare upon the girl, the import of which she was to learn at first hand.

"Duty, Miss Patricia Hamilton! Forgive poor old Bones if he suddenly drops the mask of _dolce far niente_--I go!"

He saluted again and went marching stiffly to his quarters, with all the dignity which an empty lunch-box and a dangling water-bottle would allow him.

The next morning Bones went forth importantly for the Ochori city, being entrusted with the task of holding, so to speak, the right flank of the N'gombi country.

"You will use your discretion," Sanders said at parting, "and, of course, you must keep your eyes open; if you hear the merest hint that the box is in your neighbourhood, get it."

"I think, your Excellency," said Bones, with heavy carelessness, "that I have fulfilled missions quite as delicate as this, and as for observation, why, the gift runs in my family."

"And runs so fast that you've never caught up with it," growled Hamilton.

Bones turned haughtily and saluted. It was a salute full of subdued offence.