Jacob Herbert to Faraday   10 June 1852

Trinity House, London, | 10 June 1852.

My dear Sir,

The accompanying Bottle should contain Olive Oil, but a statement having been made, that it is mixed with another kind of vegetable Oil (Rape), I am desired to send it to you, and to request to be favor’d with your opinion, as to it’s being genuine Olive Oil.

I know not if you have the means of determining this point, both Oils being vegetable; but am sure, you will kindly give the Board all the information which may be in your power¹.

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

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