1679. Aug. 17. Sir Jonas Moor died. His Sonn Sir J. M. thrown from his horse, died.

1680. Made the Voluble [?] Quadrant at my own Charge.

1680. Dec. 12. ☉ first saw and observed ye great Comet; observed it till Feb. 5, (80-81.)

1680. Mr. Newton’s first Letter to me about the Comet.

81. Imparted my observations of the Comet with ye may [be] derived from them.

85 or 86. gave him[245] the diameters of the planets in all Positions of the earth, and them in their orbits: got it back with much difficulty after 2 years detention.

He disputed against the comets of Nov. and Dec. being the same, in 2 long letters in Feb. and March 81o; now, in 85, he owned they might be so as I had asserted, and slightly mentioned me as disputing for their being the same as in ye 4th book of his principles; whereas I affirmed it, and himself disputed against it.

1687. his principles published: little notice taken of her Maties. Observatory.

1688 & 9. made the New large Arch and Staff * * * Sharp.

89. Began my observations of the * *s distances from our vertex with it.