Philosophical Transactions/Volume 54/Observations on the Eclipse of the Sun at Chatham, April 1, 1764
Read May 24,
"I am infinitely obliged to you for your kind present of the telescope glasses. I got them most curiously mounted, and, as you said, they make a 12 foot telescope, which takes in the whole Sun nearly. I set my watch by a very good vertical sun-dial, precisely at 9 o’clock, and at 8 minutes after I perceived the Moon just enter on the Sun. About half an hour after 10, the eclipse was barely annular, the light of the Sun below the Moon being but just visible, and less than a hair in the telecope. At 55 minutes past 11 the eclipse ended, and left the Sun quite round."
By this, Sir, I think you may safely conclude, that Chatham was not much more than a mile (perhaps less) south-east of the limit; which therefore passed over Rochester-bridge, or very near it.
Your most obedient humble servant,