While the identity of Joe remains unknown, emerging evidence suggests the drawing may relate to a group of works produced during Freud's 1943 visit to Loch Ness.1
Comparison with known works from the period, particularly Jimmie (Ghillie at Loch Ness), reveals notable similarities in paper dimensions, paper ageing and patina, drawing technique, and handling of the figure.2
Research undertaken at the National Portrait Gallery has also highlighted parallels between the drawing and sketchbook material from the early 1940s.3
A significant development emerged through examination of William Feaver's biography The Lives of Lucian Freud: Youth 1922-1968. Feaver records that during Freud's summer 1943 trip to Loch Ness he carried a distinctive yellow-covered sketchbook containing studies of fellow travellers, local figures and observations made during the journey.1
This raises the possibility that the drawing may have originated from this sketchbook or from the same body of work. At present, that possibility remains a research hypothesis rather than a conclusion.