Even in his scientific writings, which everything conspired to render grave and sober, the almost poetic nature of his mind shows forth. In one of his (unpublished) notebooks, now in the Royal Society's library, I found this entry:
He was quite alone under the perfectly silent sky when this was written, and he was at his post simply to make this and other such observations. But the sky was beautiful to him, and his faithful sister, Carolina, sitting below, has preserved for us the words as they dropped from his lips.
On the 11th of January, 1787, Herschel discovered two satellites to Uranus.
After he had well assured himself of their existence, but before he communicated his discovery to the world, he made this crucial test. He prepared a sketch of Uranus attended by his two satellites, as it would ap-
