Jacob Herbert to Faraday   9 January 1847

Trinity House, London, | 9th January 1847.

Sir,

Adverting to our conversation of yesterday respecting the Sample of water sent up from the Bardsey Light House, I now beg to transmit for your information an extract from Mr. Bailey's letter¹ on the subject together with the Bottle of Water refer'd to, and to acquaint you that the Board will be obliged by your favoring them with your opinion as to it's wholesomeness for drinking and culinary purposes.

The Elder Brethren have been desirous that a Sample of the Patent refined Rape Seed Oil which is now used at certain of the Corporation's Light Houses should be analysed, but before I trouble you upon that Subject, I should be obliged by your stating your opinion whether the result of such Analysis would furnish you with the means of reporting upon the goodness of the Quality of the Oil in question for burning purposes.

I am, | Sir, | Your most humble Servant, | J. Herbert

M. Faraday Esqre | &c &c &c