It is now being offered for sale by Heffel's of Vancouver, BC on October 27.
The whereabouts of Le Quai Duquesne, Dieppe, recorded in one of Ginner's notebooks, had been unknown since the early 1920s when it was sold at Christie's in London for £3 13s 6d.
The lively Post-Impressionist work was painted on Ginner's 1913 visit to Dieppe. A small pochade/sketch for the painting is in the collection of The Graves Gallery Museum, Sheffield while a sister piece from the same date titled La Vieille Balayeuse, Dieppe is in the Tate Gallery.
The 2ft 1in x 17in (63 x 43cm) oil on canvas is being sold by a descendant of the famed Canadian self-made industrialist and art collector Ernest E. Poole. During World War I, Ginner served in the British Royal Army Ordinance Corps and the Intelligence Corps prior to moving to the Canadian War Records.
The estimate is $15,000-20,000.