Frederick William Allen (b. 1822 d. 1891 or later)
Riding-school master. In business with his brother, Edward John Allen (1818–73). Of 70 Seymour Place, Bryanston Square, London, 1871, 1881.
Census returns of England and Wales 1871 (The National Archives: Public Record Office RG10/166/79/32), 1881 (RG11/147/67/32), 1891 (RG12/67/89/13)
London, England, Church of England births and baptisms, 1813–1917 (Ancestry.com, accessed 4 May 2020)
Post Office London directory 1869