Letter from [Randal Mowbray Thomas Rawdon Berkeley, 8th Earl of] Berkeley, Berkeley Castle, Gloucestershire, to [Joseph] Larmor He and Walker have a paper on mixed vapours in contact with a mixed liquid, in which they have an equation. They cannot find a flaw in it and he would like the benefit of Larmor's criticism. He asks if he may send the paper, or if Larmor might like to come for a day or two. 5 September 1918