Dora Collingwood was the eldest daughter of W. G. Collingwood.
She married Ernest Altounyan in 1915. Their children became models for the Walker children; Taqui, Susan (Susie), Roger, Titty (Mavis) and Brigit. The oldest girl, Taqui, became John in order to have another boy in the stories.
He wrote Swallows and Amazons as something for the Altounyan children to read among the sands of Syria, and sent them a copy. In 1932 he stayed with them at Aleppo, Syria.and wrote part of Peter Duck there. (LAR p301,311,323).