Two areas for significant qualitiative improvement for this profile:
1. 1891 census for Hastings Holy Trinity, Sussex Alexr (sic) Alexander Milne (40), single, is reported as having been born in Jamaica (all other census records say Baldock, Hertfordshire, but his parents did travel to Jamaica and he has siblings born/christened there), a teacher and at this time, servant to an unspecified head of household.
Citation: "England and Wales Census, 1891," FamilySearch: indexed 3 May 2019, Alexr. Milne, Hastings, Sussex, England, UK; from "1891 England, Scotland and Wales census," www.findmypast.com: citing PRO RG 12, p. 62, Piece/Folio 763/34, Sussex county, subdistrict, The National Archives of the UK, Kew, Surrey.
2. The uncertain death date derives from an archive that only lists than an obituary was made, and therefore remains speculative. FindMyPast users may be able to obtain more information on the archival image which might facilitate ruling in or out the match.
"British Newspaper Archive, Family Notices," FamilySearch: indexed 19 Apr 2019, Alexander Milne, UK; records extracted FamilySearch and images digitized by FindMyPast; citing United Kingdom, 7 Sep 1934, The British Newspaper Archive, Ireland; FHL microfilm.
It's been an interesting journey to tease out some tibdbits in the family surrounding A A Milne. Some census records were available, but had not yet been matched, and in the case of the record on item 1, no one had found it because of the variation in the name and the mismatch on the birthplace.
It seems that more often, FamilySearch in cooperation with FindMyPast is obscuring some data on additional household members, placing it behind a paywall. Of course, it could also be the case that the person that this Alexander was a servant to is still alive, but that doesn't seem too likely given the assumption that they would in all likelihood have been an adult before 1891.