21 November 1666
Cambridge
My dear Isaac,
Your paper has arrived. I haven't had time to look it over yet, but I shall find time to peruse it during the forthcoming holidays. I am, of course, very interested in what problems concerned you during the summer.
A very merry Christmas to you, my boy.
Is. Barrow
22 November 1666
FROM: Ballistics Research Dept.,
British Army Artillery
TO: Isaac Newton, A.B.,
Woolsthorpe
SUBJECT: Ballistics research data.