Subseries documents the journey of Pocock and Randle Cecil. Randle Cecil (1889 - 1917) was son of Lord Rupert Ernest William Gascoyne-Cecil, Bishop of Exeter, and in early 1913 Lord Gascoyne-Cecil asked Pocock to act as a guide and chaperon to Randle during an exploration of the Pacific North-West. They traveled mostly by horseback from Calgary, AB, to Red Bluff, CA, over the later half of 1913. Subseries contains photographs and postcards of the locations they visited, and perhaps intended to visit, as well as some people they met (mostly unidentified). It is arranged chronologically into three files: Images from unknown locations, Images from Alberta and British Columbia, and Images from Washington to California.

Files contains images of locations in Washington, Oregon, and California from Pocock and Cecil's journey in 1913. Places are identified on the postcards and photographs either by Pocock's handwriting or by printed description.

Photograph of man by a horse holding its reins. Writing on reverse reads "Henry Steinmetz of the Farmer's Stable, The Dalles, Ore."