Fuentes consultadas1. WWW VIAF, 24/10/2017 https://viaf.org/viaf/283458621/#Knollys,_Henry,_Sir,_1840-1930
2. WWW Wikipedia, 24/10/2017 Henry Knollys (Royal Artillery officer): Sir Henry Knollys KCVO (20 June 18401 March 1930) was an officer in the Royal Artillery, British Army, and from 1896 to 1919 a private secretary to Princess Maud of Wales (from 1905 Queen of Norway) https://en.wikipedia.org/wiki/Henry_Knollys_(Royal_Artillery_officer)
3. The elements of field-artillery, 1877 port. (Henry Knollys, Captain Royal Artilery)
4. WWW LC auth., 24/10/2017 Knollys, Henry, Sir (1840-1930)