TALBOT4457

Royal Polytechnic Insⁿ
March 18^th 1842 –

D^r Sir

We shall not be closed more than a week, & hope by that time to have D^r Ryan ¹ back again from the Country when arrangements will be made for commencing the Lectures on the Calotype ² – Captⁿ Ibbetson ³ is going on with the experiments daily –

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

H^y Fox Talbot Esq.