Armitstead was born on 28 February 1824 at Riga, the second son of an English jute merchant living in Latvia.
[5] He donated £5,000 to the Prince of Wales Hospital Fund and shortly afterwards was created Baron Armitstead, of Castlehill in the city of Dundee, on 19 July 1906,[6] by Arthur Balfour, having refused an offer in 1893 by his great friend William Ewart Gladstone.
When Lady Armitstead gave her husband an ultimatum, he accepted it and she walked in her nightgown to the lodge where she spent the night.
[4] Lord Armitstead died at his London residence on 7 December 1915 at the age of 91 and, after cremation at Golders Green Crematorium, his ashes were buried at Western Cemetery, Dundee.
Another nephew, Henry Alfred Armitstead, served as a diplomat in Russia and seems to have been involved in an attempt to rescue Tsar Nicholas II after the Russian Revolution.