I shall be very pleased to do what I can to help you in your researches about John Pell. I shall be able to put your letter before Council on the 10th inst. [instant] & will ask leave on your behalf to consult & to make extracts from the Archives for this purpose. Any day after that date between 11 & 6 (except Saturdays) you can carry on your researches here.
I am, yours faithfully,
Asst Sec RS [Assistant Secretary, Royal Society]'.