Triggs designed many formal gardens and later some country houses, mostly in southern England. He specialised in historical research and in re-creating gardens of the past. His books influenced the Italian mode of the Arts and Crafts style in England. In 1906 he was awarded the
Godwin Bursary, presenting two reports: "The planning of public squares and open spaces" (76 pages), relating to the cities of Paris, Berlin, Vienna and Munich, including public monuments and fountains; "Le Petit Palais, Paris" (20 pages), a detailed description of the
Musée des Beaux-Arts building, Avenue Winston Churchill, designed by
Charles Girault and built between 1897 and 1900. In the 1910s Triggs was in partnership with the architect
William Frederick Unsworth (1851–1912), and his son Gerald Unsworth (1883–1946), in
Petersfield, Hampshire. W. F. Unsworth had previously designed the
Shakespeare Memorial Theatre in
Stratford-upon-Avon in 1879, which was destroyed by fire in 1926 and replaced in 1932 with the present
Royal Shakespeare Theatre. In 1919, Triggs was tasked by The Whiteley Homes Trust to plan and supervise the landscaping of the area around
Whiteley Village, Walton on Thames, Surrey, constructing tree-lined avenues and turfed walks, with fruiting trees and shrubs and lavender borders. He also designed Cooper's Bridge at
Bramshott and the War Memorial in
Petersfield High Street in 1922. ==Personal life==