SILVERTHORNE, Thomas Cosford (1857-1941), born in Wingham, Ontario, was first recorded in Perth County, Ontario where he prepared a competent Gothic design for the Methodist Church at LISTOWEL, ONT. in 1886. He is likely the same architect who appears nearly five years later in Portage La Prairie, Man. and who maintained an office there from 1891 until 1899, but no information has been found on his activity after this date (Henderson's Manitoba & Northwest Territories Directory, 1899, 522). He is almost certainly the same "Thomas Silverthorne" recorded in the 1911 Census of Canada as living in nearby Dauphin, Manitoba. He later died at Bowsman, Manitoba on 19 July 1941 (Province of Manitoba, Register of Deaths, 1941).
Thomas C. SILVERTHORNE (works in Listowel, Ont.)
METHODIST CHURCH, Inkerman Street at Division Street, 1886; burned 1940 (Listowel Standard, 24 Dec. 1886; Listowel United Church Golden Jubilee, 1936, 4, illus.)
Thomas C. SILVERTHORNE (works in Portage La Prairie, Man.)
LAURENS BLOCK, reconstruction of a commercial block with new facade for A. Laurens, Saskatchewan Avenue at Main Street, 1896 (Manitoba Free Press [Winnipeg], 8 June 1896, 7)
McLEOD BLOCK, reconstruction of a commercial block for John McLeod '......east of the Opera House', Saskatchewan Avenue, 1896 (Manitoba Free Press [Winnipeg], 8 June 1896, 7)
METHODIST CHURCH, 1896 (C.R., vii, 23 April 1896, 2, t.c.; Christian Guardian [Toronto], 12 Aug. 1896, 521)
HOME FOR INCURABLES, major addition, 1897 (Winnipeg Tribune, 26 May 1897, 6, t.c.; C.A.B., xi, Feb. 1898, 28)
TOWN HALL, alterations and remodelling, 1897 (C.R., viii, 6 May 1897, 2, t.c.)
unnamed street, residence for V.G. O'Brien, 1897 (C.R., viii, 10 June 1897, 1)
ST. MARY LA PRAIRIE ANGLICAN CHURCH, Second Street, 1898 (C.R., ix, 27 April 1898, 2)
EAST WARD SCHOOL, major addition, 1898 (Manitoba Morning Free Press [Winnipeg], 25 June 1898, 13, t.c.; C.R., ix, 29 June 1898, 2, t.c.)
Thomas C. SILVERTHORNE (works elsewhere in Manitoba)
MacGREGOR, MAN., a residence for an unnamed client, 1898 (Manitoba Morning Free Press [Winnipeg], 23 April 1898, 9)
DAUPHIN, MAN., public school, 1898 (C.R., ix, 5 Oct. 1898, 2; Weekly News [Dauphin], 16 Feb. 1900, 9, descrip.)