Dec. 3o.-This morning my dear father carried me to Dr. Herschel.  That great and very extraordinary man received us with almost open arms, He is very fond of my father, who is one of the Council of the Royal Society this year, as well as 445

himself, and he has much invited me when we have met at the Lodge or at Mr. de Luc’s.

At this time of day there was nothing to see but his instruments:  those, however, are curiosities sufficient.  His immense new telescope, the largest ever constructed, will still, I fear, require a year or two more for finishing, but I hope it will then reward his labour and ingenuity by the new views of the heavenly bodies, and their motions, which he flatters himself will be procured by it.  Already, with that he has now in use, he has discovered fifteen hundred universes !  How many more he can find who can conjecture?  The moon, too, which seems his favourite object, has already afforded him two volcanoes ; and his own planet, the Georgium sidus,(229) has now shewn two satellites. >From such a man what may not astronomy expect, when an instrument superior in magnitude to any ever yet made, and constructed wholly by himself or under his own eye, is the vehicle of his observation?

I wished very much to have seen his sister, whose knowledge in his own science is so extraordinary, and who herself was the first discoverer of the last comet ; but she had been up all night, and was then in bed.

Mr. Smelt joined us by appointment ; and the Bishop of Worcester came afterwards, with Dr. Douglas, to whom I was then introduced.  He is the famous editor, who has published and revised and corrected so many works:  among them the last voyage round the world.

By the invitation of Mr. Herschel, I now took a walk which will sound to you rather strange :  it was through his telescope and it held me quite upright, and without the least inconvenience ; so would it have done had I been dressed in feathers and a bell hoop—­such is its circumference.  Mr. Smelt led the way, walking also upright ; and my father followed.  After we were gone, the bishop and Dr. Douglas were tempted, for its oddity, to make the same promenade.

Illness, and some reflections it gave rise to.

Wednesday, Jan. 10, 1787.-This morning, when I was hurrying to the queen, I met Mr. Fairly, who said he was waiting to see me.  Very melancholy he looked-very much changed from what I had seen him.  His lady, to whom he is much attached,

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is suffering death by inches, from the most painful of all complaints, a cancer.  His eldest son, who seems about twelve years old, was with him.  He was going, he said, to place him at Eton.

The day following I was taken very ill myself; a’bilious fever, long lurking, suddenly seized me, and a rheumatism in my head at the same time.  I was forced to send to Mr. Battiscombe for advice, and to Miss Planta to officiate for me at night with the queen.