In another hour he was in the hills, which he found without people. Through every opening in the leaves he saw Washington and he could also discern long lines of redoubts on the Virginia side of the river.
Late in the afternoon he came to a small, abandoned log cabin. He inferred that its owner had moved away because of the war. As nearly as he could judge it had not been occupied for several weeks. Back of it was a small meadow enclosed with a rail fence, but everything else was deep woods. He turned his horse into the meadow and left his saddle, bridle and saddle blanket in the house. He might not find anything when he returned, but he must take the risk.
Then he set off at a brisk pace through the woods, which opened out a little after dusk, and disclosed a great pillared white house, with surrounding outbuildings. He knew at once that this was Arlington, the home of one of the Southern generals, Lee, of whom he had heard his father speak well.
But he also saw, despite the dusk, blue uniforms and the gleam of bayonets. And as he looked he saw, too, earthworks and the signs that many men were present. He lay long among the bushes until the night thickened and darkened and he resolved to inspect the earthworks thoroughly. No very strict watch seemed to be kept, and, in truth, it did not seem to be needed here so near to Washington, and so far away from the Southern army.
Before ten o'clock everything settled into quiet, and he cautiously climbed a great beech which was in full and deep foliage. The boughs were so many and the leaves so dense that one standing directly under him could not have seen him. But he went up as far as he could go, and, crouched there, made a comprehensive survey.
It was a fine moonlight night and he saw the earthworks stretching for a long distance, thorough and impregnable to anything except a great army. Beyond that was a silver band which was the Potomac, and beyond the river were the clustered roofs which were Washington. But he turned his eyes back to the earthworks, and he tried to fasten firmly in his mind their number and location. This, too, would be important news, most welcome to Beauregard.
The boy's elation grew. They had given him a delicate and dangerous task, but he was doing it. He had overcome every obstacle so far, and he would overcome them to the end. He was bound to enter that Washington which, in the distance, seemed to lie in such a close cluster.
He felt that he had lingered long enough at Arlington, and, descending, he made a great curve around the earthworks, coming to the river north of Arlington. His next problem was the passage of the Potomac. He did not dare to try Long Bridge, which he knew would be guarded strictly, but he thought he might find some boatman who would take him over. As the capital was so crowded, the farmers were continually crossing with loads of provisions, and now that an uncommonly hot July had come the night would be a favorite time for the passage.
A search up and down the bank brought its reward. A Virginian, who said his name was Grimes, had a heavy boat filled with vegetables, and Harry was welcome as a helper.
"It's a dollar for you," said Grimes, who did not trouble to ask the boy his name, "an' here are your oars."