20 Conduit St
The experiments will be tried tomorrow evening at King’s College, and eight o’clock is the hour appointed. I shall be most happy to show them to the Marquis of Lansdowne <1> or to any other friend whom you may honour me by bringing.
I remain dear Sir Very truly yours
1. Henry Petty Fitzmaurice, 3rd Marquess of Lansdowne (1780–1863), MP, WHFT’s uncle.