TALBOT7105

Kensall Green ¹
Dec^r 28/54

Sir

I have some recolection of the person you speak of from yorkshire but I do not remember his name and I do not think wee have his name in our books (altho I will look and if I find it lett you know) as I think wee did not charged him for the instructions we give him, I have no recollection of ever employing a person the name of Porter,² there may have been such a person employed in Regent S^{t 3} as men but not as master -

I have tried the expirement with the Galic Acid as you desired and the result was that the moment the Galic Acid was poured of the plate the negative came out quit as quick as with pyro Galic Acid, but very faint and all the warming afterwards would not bring it out any more, altho I boiled the galic Acid on the plate with a spirit lamp it kept clean but it would not come out any more (of course you know that with nitra of Silver it comes out very well) I believe M^r Crooks⁴ [illegible deletion] made a very good portrait in developing with the Galo nitrate. The galic Seem to require moore nitra of Silver in developing than the pyro Galic, for the Silver that remains on the plate after it comes [illegible deletion] out the nitra bath & Camera is often Suficient, unless you keep the plate to long then it is best to dip the plate in the nitra of Silver bath again, or els mix a little nitra of Silver intu the pyro but I prefer dipping the plate in the bath first as you get a Cleaner Picture

there is an article on PyroGalic Acid in the last number to the Photographic journal, if you like I will send you it⁵

your Obidient Servant.
N: Henneman