[1] Gask, accompanied by his second wife, their two sons, and by a daughter of his first marriage, emigrated to Adelaide, South Australia in 1920, where he set up practice as a dentist.

[1] He began writing crime fiction while waiting for his patients and in 1921 paid for the publication of his first novel, The Secret of the Sandhills, which was an immediate success,[1] which he partly attributed to generous reviews by S. Talbot Smith.

Gask's work was translated into several European languages, serialised in newspapers and broadcast on radio.

Wells regarded The Vengeance of Larose (1939) as Gask's "best piece of story-telling...It kept me up till half-past one.

Russell confided that he was a reader of Mr. Gask's books in England, and said that now they were so near to each other he felt he really must make his acquaintance.