Thomas Percy was born and grew up in Dublin, Ireland. He trained as an architect in his father's office, before coming to Melbourne in 1899. From about 1908 he worked for P.B. Hudson, Architect, and as consultant engineer for Monier Concrete Co., Contractors. He lived for a time in Townsville before moving to Brisbane in about 1928, where he worked as an architect. In 1934 he changed his surname from Pearce to Percy. In 1941 he joined the Commonwealth service and, after receiving injuries in the air raids, returned to Melbourne.
Thomas Percy contributed to several newspapers, including the Herald (Melbourne), the Brisbane Telegraph and the Brisbane Courier Mail. He was also a war correspondent for the Johannesburg Star, during the Matabele Rebellion. As well as The Soul of Anzac in Verse and Prose, he wrote The Heart of the Diocese : St. John's Cathedral (1933).
