"I--I just thought of a riddle," said Laddie, as he and Vi started out.

"Let me hear it," suggested Aunt Jo.

"What is it that's so big you can't put it in anything?" he asked.

"That's the riddle. What is it that's so big you can't put it in anything in this world?"

"The ocean," answered Rose, who came along just then.

"Nope!" and Laddie shook his head.

"Well, the ocean is terrible big," Violet stated.

"Yes, it is," agreed Laddie. "But that isn't the answer to my riddle."

"Do you mean the sky?" asked Russ. "That's big, too."

"That isn't the answer," said Laddie. "I'll tell you, 'cause you never could guess it. It's a hole that you dig. You can dig one so big that you couldn't put it in anything. Not even the biggest box that ever was.

Isn't that a good riddle?"

"Yes, it's pretty good," agreed Russ; and he commenced to whistle a merry tune. "But you could fill a small box with some dirt, and dig a little hole in that, and you'd have a hole in a box," he added, after a moment.

"Yes, but the answer to my riddle is a _big_ hole," said Laddie. "Now come on out and dig!"

"How big a hole are you going to dig?" Vi wanted to know.

"Oh, not the kind in my riddle," replied her brother. "We'll just dig a little one and make believe we're after treasure."

Of course I need not tell you that Laddie and Violet did not find any.

Treasure doesn't usually grow in Boston back yards. But the children had fun, and that was best of all.

During the next few days there was much packing of trunks and valises to do, for the six little Bunkers were getting ready to go to Cousin Tom's at Seaview. This was a place on the New Jersey coast, and none of the Bunkers had ever been there. For Cousin Tom had been only recently married to a very pretty girl, named Ruth Robinson. Cousin Tom and his bride had stopped to pay a visit to Daddy and Mother Bunker when the young couple were on their honeymoon trip, and then Cousin Tom and his wife had said that as soon as they were settled in their new seash.o.r.e home the Bunkers must come to see them.

"And now we are going," said Mother Bunker, on the morning of the day they were to leave Aunt Jo's. The last trunk had been locked and sent away, and the family of travelers was soon to take the train from Boston to Fall River. There they would get on a boat that would take them to New York, and from New York they could go on another boat to Atlantic Highlands, in New Jersey. Then they would take a train down the coast to Seaview.

"Well, I certainly shall miss you!" said Aunt Jo, as she kissed the big and little Bunkers good-bye. "And I hope, children, that you find lots of treasure in the sand."

"We'll dig deep for it," said Laddie. "Did you hear my riddle, Aunt Jo, about what's so big you can't put it in anything?"

"Yes, dear, I heard it."

"The answer is a _big_ hole," went on Laddie, lest his aunt might have forgotten.

"I remember," she said with a laugh.

The trip to Fall River was not a very long one, and the six little Bunkers, who looked out of the windows at the sights they saw, hardly realized it when they were told it was time to get off the train.

"Where do we go now?" asked Rose, as she helped her mother by carrying a package in one hand and holding to Margy with the other. Rose was a real "mother's helper" that day.

"We go on the boat now," said Daddy Bunker. "And I want you children to be very careful. We are going to ride on the boat all night, and we shall be in New York in the morning."

"Shall we sleep on the boat?" asked Laddie.

"Yes, we'll have cute little beds to sleep in," said Mother Bunker.

A half hour later they were on one of the big Fall River boats that make nightly trips between New York and the Ma.s.sachusetts city. The Bunkers were shown to their state-rooms. They had three large apartments, with several bunks, or beds, in each one, so there would be plenty of room.

They had their supper on the boat, and then they went out on deck in the evening. There were many sights new and strange to the children, and they looked eagerly at each one. Then it grew dark, and it was decided that the time had come for little folks to "turn in," and go to sleep.

Laddie, who with Russ and his father shared a room together, was looking from the window of the stateroom, out into the dark night, when he suddenly cried out:

"Oh, there's going to be a big thunder storm! I just saw the flash of lightning!"

"Are you sure it was lightning?" asked Mr. Bunker with a smile. "I didn't hear any thunder."

"There it is again!" cried Laddie, and this time a ray of bright, white light shone in the window, full in Laddie's face.

CHAPTER IV

A MIX-UP

"That isn't lightning," said Russ, who had come to the window of the stateroom to stand beside his brother and look out.

"'Tis, too!" insisted Laddie, as another flash came. "It's lightning, and maybe it'll set our boat on fire, and then we can't go to Cousin Tom's an' dig for gold! So there!"

Mr. Bunker, who was opening a valise in one corner of the room, getting out the boys' pajamas for the night, had not seen the light shining in the window, but had seen the glare of it on the wall.

"'Tisn't lightning at all!" declared Russ again.

"How do you know it isn't?" asked Laddie.

"'Cause lightning flashes are a different color," said Russ. "And, besides, they don't stay still so long. Look, Daddy, this one is peeping right in our window like a light from Aunt Jo's automobile!"

Mr. Bunker turned in time to see the bright flash of light come in through the window, and then it seemed to stay in the room, making it much brighter than the light from the electric lamps on the wall.

"Of course that isn't lightning!" said Mr. Bunker. "That's a search-light from some ship. Come on out on deck, boys, and we'll see it."

The bright glare was still in the room, but it did not flare up as lightning would have done, and there were no loud claps of thunder.

"Well, if it isn't a storm I'll come out on deck and look," Laddie said.

"But if it rains I'm coming in!"

"It won't," said Daddy Bunker with a laugh. "We'll go out for a few minutes, and then we'll come in and go to bed. To-morrow we'll be at Cousin Tom's."

Out on the deck of the big Fall River boat they went, and, surely enough, the light did come from the search-lantern of a big ship not far away. It was a United States warship, the boys' father told them, and it was probably kept near Newport, where there is a station at which young sailors are trained. The warship flashed the light all about the water, lighting up other boats.