Probate record states: "Troon, William of 42 Southborough-road South Hackney Middlesex gentleman died 22 February 1894 Probate London 20 March to James Smith retired customs officer and Charles Alfred Emerson solicitor Effects 881 pounds 10 shillings (Ancestry.com. England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2010).
(Original data: Principal Probate Registry. Calendar of the Grants of Probate and Letters of Administration made in the Probate Registries of the High Court of Justice in England. London, England © Crown copyright). Note: Emerson was Troon's son-in-law).
I calculate 881 pounds in 1894 being worth about $130,000 in 2016 (EAD)