Copy letter from C R [Charles Richard] Weld, the Assistant Secretary of the Royal Society; to [James] Yates, Esq Has lay the application to see the standard yard and weight before the Council, and informs they have granted permission to see the instrument. States James Yates can see the instrument any day of the week, but as Weld must be present, suggests Tuesday at 1 o clock [1 February]. Asks to be written to if this is not a convenient date. 27 January 1854