Hi Karen, did you get anywhere with finding the death of Sayer?I've been going through some old research papers and I have found a copy of a Carl Smith card which says the following. (unfortunately I haven't got a note of the number of the card)
Sayer, George Sidney Burton 1908, Sept, 15 DP. married Sept.5 Shanghai, George Sydney Burton Sayer, to jenniie, only surviving daughter of late Isaac Hall of Cavan, County Monaghan, Ireland.
1910, June 18, Telegr. Supple. died June 4, Shanghai, Kathleen Mary, infant daughter of G. Burton Sayer
1913 Dec 27 - SCMP, born Dec 20, Shanghai daughter to G. Burton Sayer,
Will File 183 of 1915 No. 2829 George John Budds Sayer [this name was in bold, but I can't do bold here]
Victoria H.K., to wife Charlotte Knight Sayer, dated 31 July 1912. Witness Herbert Stephens, Arthur Ambrose Stephens.
???(unreadable text)..edged 4 Oct. 1915
Daughter "Edith Marion,", born Portland, England, 16 May 1890, to live with my wife and obey her in all things lawful and residue after death of wife to our daughter to make her abode (if still single) with either her sister or brothers. (statement - G.J.B. Sayer, Civil Engineer, Architect and Surveyor 19 Queens Road, Central).
Will - 84/1948/5279 - George Sidney Burton Sayer. - 12 Sept.1945 - 21 May 1947 of Chin Ming,Tunbridge Welles, Co., Kent, journalist, daughter Margaret Aileen Connolly/