Traveling had certainly not dulled the keenness of Jack’s appetite either, and he assured Mr. Warner, as they entered the long dining-room, that he would be able to do justice to the steak in question. And he clearly demonstrated this fact during the ensuing hour.

The evening was spent in Mr. Warner’s room, for the engineer had a great deal to do in the way of packing clothes, books, and bundles of blueprints. At nine o’clock he called for a bell boy and instructed that worthy to bring two glasses of iced lemonade and a dish of assorted crackers, to fortify themselves, as Mr. Warner humorously explained, against a night attack of hunger.

Jack was thoroughly in accord with this strategic measure and fell to with a will. The luncheon disposed of, Mr. Warner suggested that they retire, since they would have to have breakfast at sunrise the following morning in order to report at the lighthouse depot at half-past six.

Considering the importance of the day, it is not at all surprising that Jack did not oversleep next morning. Indeed, he was up and dressed and ready to go down to the dining-room when Mr. Warner knocked on his door to arouse him. Breakfast was disposed of in short order, and the engineer and his young companion were on their way down to the waterfront before the city was thoroughly awake.

But the men at the district lighthouse depot were wide awake and working with a vigor when they arrived. They were loading tools and supplies on board the Blueflower, and from the pile of barrels and boxes on the long dock at which the tender was moored it was evident that it would be some little time before the engineer of the Hood Island expedition would be ready to start.

The depot was an extremely interesting place to Jack. It was a reservation on the edge of Portland Harbor, surrounded by a high brick wall. Part of this space was taken up by long low buildings occupied as repair shops, and the remainder was devoted to storeyard space. Long docks reached out from the shore front and at these a varied assortment of craft were moored, ranging from tiny motor boats to the businesslike looking Blueflower. There was a frowning gray torpedo boat destroyer that had put in there for some official reason or other, and two weather-beaten lightships that were undergoing repairs, not to mention a coal barge and several other unimportant vessels. On the docks and in the storeyard were huge iron buoys that looked quite enormous out of water. These were being painted and repaired, and Mr. Warner explained that they would soon be loaded aboard a tender and taken out to the various bars and reefs in the harbor to be planted as permanent channel marks.

The lightships were curious looking vessels. They were built of steel and painted red, with their name marked in tall white letters the entire length of the hull.

Each was equipped with two steel masts at the top of which were the lanterns and the big wickerwork day marks. The mast of one of the boats had been taken out, and Mr. Warner explained that she would later be equipped with a new kind of mast like a miniature lighthouse, which would be built of steel and large enough to permit a man to climb up through its center and not expose himself to the fury of the elements.

“Service on board the lightships, Jack,” said Mr. Warner as they walked through the yard, “is not as dreary as it might seem. These vessels are usually anchored out in the steamship lanes and passing vessels steer dead on for their light in order to keep into the deep channel. Imagine how comfortable it must be on a foggy night to be aboard one of these vessels and know that every steamer coming that way is headed straight for you. Oh, yes, they are run down quite frequently, for you see that they are without motive power in most cases and cannot get away from danger. Then, too, they are not allowed to slip their cable or leave their anchorage under any circumstances, no matter what the danger may be.

“There have been several serious accidents since the United States established a lightship service back in 1820, by putting a light vessel at the entrance of Chesapeake Bay.”