TALBOT4258

Dear Sir,

I return you many thanks for the remainder of the Account ¹ of your very curious Photographic process, ² which I shall keep secret till you shall give it to the World. The Gallic Acid you have been so kind as to send is not to be got here, & what I had in my possession for examining its doubly refractive structure is not pure I presume.

I am unluckily on the eve of leaving this to attend the General Assembly of our Church, ³ which is at present in a state of illegal persecution by the Civil Courts, so that I shall not be able for a fortnight to put your process into practice.

I am Dear Sir, Ever Most Faithfully yrs
D Brewster

S^t Leonards
S^t Andrews
May 15^th 1841