Castle Parsonstown

February 8^th 1854

Dear Talbot –

I am much obliged for your hints. We made use of the sulphate of iron and obtained I believe a negative image: the plates however have been since cleaned and I cannot therefore refer to them to ascertain the fact. The first clear night the experiments shall be continued hoping that point is near, and we shall employ the pyrogallic acid. You are of course most welcome to lend the Photographs to the Exhibition

Yrs truly

Rosse