Jacob Herbert to Faraday   19 April 1855

Trinity House | 19th April 1855.

My dear Sir,

I send you herewith two Sample Bottles of Water which the Elder Brethren will be glad if you will examine, and acquaint me, whether they contain any, and if so what, description of impurities.

I remain | My dear Sir, | Your very faithful Servant | J. Herbert

M. Faraday Esq | &c &c &c