Brigade drill, as established by order in the Field exercise and evolutions of infantry, as revised in 1859. With remarks and references, by W. N. Hutchinson, 1860, War Office, google books
Lot 48240, Important African and Oceanic Art Auction, Dallas, Texas, Heritage Auction Galleries, Auction N°645, June 7, 2007, p. 156, ISBN1599671522, 9781599671529, google books
Owen, Lisa, Carving Devotion in the Jain Caves at Ellora, p. 90, 2012, BRILL, ISBN9004206299, 9789004206298, google books
heritagepreservation.org
"For figurative works, use the abbreviations PR (proper right) and PL (proper left) to indicate the right or left side of the statue from the perspective of the statue (i.e., your right or left side if you were positioned on the base facing in the same direction as the statue)" – p. 34, Save Outdoor Sculpture! Volunteer Handbook.