Copy letter from Robert William Frederick Harrison, to Lord Kelvin [William Thomson], Fellow of the Royal Society 'My Lord, In case Dr [Michael] Foster has not spoken to you in response to your note as to an invitation to the Soiree for Sir W. H. and Lady Russell, I send one line to say that Sir W. and Lady Russell are duly entered on the list of invitations approved by the Soiree Committee. I am, faithfully yours, Robt Harrison Asst. Sec. RS. [Assistant Secretary, Royal Society]'. 21 May 1896