was obliged to make to order and provide the tools and materials which were continually wanting, I may say by wholesale.
The discovery of the Georgian satellites caused many breaks in the sweeps which were made at the end of 1786 and beginning of 1787, by leaving off abruptly against the meridian passage of the planet, which occasioned much work, both in shifting of the instrument and booking the observations. Much confusion at first prevailed among the loose papers on which the first observations were noted, and some of them have perhaps been lost; for I remember several configurations of the situation of the satellites having been made by Sir William Watson and Mr. Marsden, and only one could be found. . . . .
*****
That the discovery of these satellites must have brought many nocturnal visitors to Slough may easily be imagined, and many times have I listened with pain to the conversation my brother held with his astronomical friends when quite exhausted by answering their numerous questions. For I well knew that on such occasions, instead of renewing his strength by going to rest, that there were too many who could not go on without his direction, among whom I often was included, for I very seldom could get a paper out of his hands time enough for finishing the copy against the appointed day for its being taken to town. But considering that no less than seven papers were delivered to the Royal Society in 1786-1787, it may easily be judged that my brother's study had not been entirely deserted. I had always some kind of work in hand with which I could proceed without troubling him with questions; such as the temporary index which I began in June, 1787. Some years after, the index to Flamsteed's observations, calculating the beginning and ending of sweeps and their breadth,
