He was born at
Findhorn in
Moray, the son of the writer and journalist
Walter Thom. He was educated at the
High School, Edinburgh, and went to
Dublin at age 20 to assist his father in the management of the
Dublin Journal. On his father's death he obtained, through the influence of
Sir Robert Peel, the contract for printing for the post office in Ireland. In 1838 he obtained the contract for the printing for all royal commissions in Ireland, and in 1876 was appointed to the post of Queen's Printer for Ireland. In 1844, Thom founded the work for which he is known, the
Irish Almanac and Official Directory, which became a leader in its field, incorporating statistics relating to Ireland. '''"Thom's Directory"
was revised annually; in 1960 it was split into Thom's Dublin Street Directory
and Thom's Commercial Directory'
, revised in alternate years until 2012. James Joyce relied heavily on the 1904 edition when writing Ulysses''. In 1860, he published for free distribution
A Collection of Tracts and Treatises illustrative of the Natural History, Antiquities, and the Political and Social State of Ireland, two volumes which contain reprints of writers on Irish affairs in the seventeenth and eighteenth centuries. Included are works of
James Ware,
Edmund Spenser,
Sir John Davies,
William Petty,
George Berkeley, and others such as
Gerard Boate,
Thomas Prior and
Arthur Dobbs. Thom, who was twice married, died at his residence,
Donnycarney House, near Dublin, on 22 December 1879. Today the house forms the clubhouse of Clontarf Golf Club. ==List of Thom's Directories available free online==