I intend sending off two letters to you today one to Swansea1 & the present, to say that I have you down for the 13th March & conclude you will be quite ready2[.]
See Lit.Gaz., 21 March 1840, p.184 for an account of Grove's Friday Evening Discourse of 13 March 1840 "On Voltaic Reaction, or the Phenomena normally termed Polarisation".