Peter Henry Berthon to Faraday   7 April 1864

Trinity House | 7 April 1864

Dear Sir

I am directed to request that you will favor the Elder Brethren by making an examination of the Sample of White Lead marked 1864A, herewith sent, and reporting to me the result of the Analysis for their information.

I am | Dear Sir | Your’s faithfully | P.H. Berthon

M. Faraday Esq D.C.L. | &c &c &c