Thomas Joseph Firbank (13 June 1910 – 1 December 2000) was a Canadian/Welsh author, farmer, soldier and engineer.
He was born in Quebec, Canada, to an English father and a Welsh mother. His parents were Hubert Somerset Firbank, a railway contractor born in 1887 in Chiselhurst, Kent (to Sir Joseph Thomas Firbank) and Gwendoline Louise Lewis (who were married in 1909 in Dolgellau, Merionethshire, Wales). Following his father's early death, he was raised among his mother's hill-farming community in the Berwyn Mountains of North Wales. He was educated at Stowe School.
His first book, an autobiography entitled I Bought a Mountain () was published in 1940 and became a major international best-seller. It describes how aged only 21, he bought Dyffryn Mymbyr farm, a 2,400-acre (9.7 km2) sheep farm in Capel Curig, North Wales, in 1931 and painstakingly learned his trade, while portraying the beauty of Snowdonia. Firbank was a keen mountain walker, and the book includes a hair-raising account of how he and his two companions were possibly the first to ascend all of the Welsh 3000s in less than 9 hours. Firbank's first wife, Esme Cummins, a Surrey-born actress whom he met in 1933, features prominently.
The book ends with pastoral calm interrupted by the ominous drumbeats of the Second World War which drew Thomas Firbank away from his beloved farm to enlist in the Coldstream Guards. He was later seconded to the newly formed Airborne Forces with whom he fought in North Africa, Italy and Arnhem, and was awarded the Military Cross. At the end of the war, as Lieutenant-Colonel, he commanded the Airborne Forces Depot on the Isle of Wight. His book I Bought a Star, (, pub. 1951) describes his war-time experiences with the 1st Airborne Division.