was born in Fort Meade, Florida, USA in 1891 to Isbela Lyle Thomson.
Thomson would have joined the Belfast Banking Company around 1908. A John Oliver Horner (1911 aged 77, Merchant) of Limavady provided the necessary surety to the bank.
In 1911 he is boarding in house 18, Scotch Street, Dungannon, Co. Tyrone. The property may have been a hotel. Thomson is described as a Bank Clerk. He served part of his banking career in Ballymena branch.
On 4th September 1914 Benjamin enlisted into the (North Belfast) Royal Irish Rifles with Service Number 3733.
Benjamin Black Thomson died on 28th January 1959 and is buried in Ballywillan Cemetery, Portrush.