Royal Institution | 19 Mar 1850
Sir
I regret I cannot comply with your request but it is against my long established & invariable rule[.]
I am Sir | Your Very Obedient Servant | M. Faraday
Chas. Hyde Esq | &c &c &c
Please cite as “Faraday2271,” in Ɛpsilon: The Michael Faraday Collection accessed on 29 March 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday2271