Scotland Liddell arrived in Petrograd in the spring of 1915 and soon moved to Warsaw, where he served as a member of the Group of Polish Red Cross Volunteers with the Russian army. He also contributed articles to The Sphere as its special correspondent.
^Anthony Cross. In the Land of the Romanovs: An Annotated Bibliography of First-hand English-language Accounts of the Russian Empire (1613-1917), Cambridge, UK: Open Book Publishers, 2014. ISBN978-1-78374-060-4, p. 390