By "I understand" they meant the responsive signal given, in all telegraphy, by an operator who has received and understood a message. As soon as this exercise had been three times repeated, they proceeded in a solid body--much the most apparent object I had had until now--to Circle No. 3, and then evidently descended into the MOON. The eclipse soon began, but I knew the MOON'S path now, and followed the dusky, coppery spot without difficulty. At 1.33 it emerged, and in a very few moments I saw the solid column pass from Circle No. 3 again, deploy on the edge again, and repeat three times the signal:-- "Show `I understand' on the Saw-Mill Flat." "Show `I understand' on the Saw-Mill Flat." "Show `I understand' on the Saw-Mill Flat." It was clear that Orcutt had known that the edge of his little world would be most easy of observation, and that he had guessed that the moments of obscuration and of emersion were the moments when observers would be most careful. After this signal they broke up again, and I could not follow them. With daylight I sent off a despatch to Haliburton, and, grateful and happy in comparison, sank into the first sleep not haunted by horrid dreams, which I had known for years. Haliburton knew that George Orcutt had taken with him a good Dolland's refractor, which he had bought in London, of a two-inch glass. He knew that this would give Orcutt a very considerable power, if he could only adjust it accurately enough to find No. 9 in the 3d Range. Orcutt had chosen well in selecting the "Saw-Mill Flat," a large meadow, easily distinguished by the peculiar shape of the mill-pond which we had made. Eager though Haliburton was to join me, he loyally took moneys, caught the first train to Skowhegan, and, travelling thence, in thirty-six hours more was again descending Spoonwood Hill, for the first time since our futile observations. The snow lay white upon the Flat. With Rob. Shea's help, he rapidly unrolled a piece of black cambric twenty yards long, and pinned it to the crust upon the snow; another by its side, and another. Much cambric had he left. They had carried down with them enough for the funerals of two Presidents. Haliburton showed the symbols for "I understand," but he could not resist also displaying ..-- .--, which are the dots and lines to represent O. K., which, he says, is the shortest message of comfort. And not having exhausted the space on the Flat, he and Robert, before night closed in, made a gigantic O. K., fifteen yards from top to bottom, and in marks that were fifteen feet through. I had telegraphed my great news to Haliburton on Monday night. Tuesday night he was at Skowhegan. Thursday night he was at No. 9. Friday he and Rob. stretched their cambric. Meanwhile, every day I slept. Every night I was glued to the eye-piece. Fifteen minutes before the eclipse every night this weird dance of leaps two hundred feet high, followed by hops of