TALBOT4543

Royal Polytechnic Instⁿ
July 13/42

D^r Sir

I am happy to inform you that the Calotype Lectures ¹ go off very well & are satisfactory to the Public & to all parties when you come to London the D^r will have much pleasure in going thr^o some experiments with you & will be much obliged by your suggestions, will you be kind enough to let me know a day or two before it may be convenient for you to be with us –

I have the honor to be Sir Your Ob^dt Serv^t
Rob^t J Longbottom

H^y Fox Talbot Esq^e &c &c