Many thanks for your messages, Wilcoxon and Countrylover

Thanks for telling me about Sydney's daughter, post 1901 census, Wilcoxon. I wasn't sure who she married until you mentioned Herbert William's name.
Joseph Guest's oldest brother was William Henry Guest, b 1855 - d 21 Nov 1916 in Paddington, London. He was 12 years older than Joseph (b 1867).
My notes on brother William say:
Originally enlisted 19 Aug 1876. Then again on 4 April 1900. Was a sergeant in the Royal Horse Artillery, B.B. Battery. (No. 8444), Regimental No. 1216. Discharged 3rd April 1901 in Christchurch. Age 45 yrs and 11 months.
Had scar on right elbow.
Enlisted again 16 Oct 1914. Discharged 4 Sept 1916, age 50. Trade: Superintendent of Gardens.
Served in India for one year and four months -- source: British Army Pension Records.
It's good to know that what is mentioned about William being a soldier (in the newspaper), fits.
Best wishes,
Rachel