Richmond F. Allan, a former solicitor at the Interior Department who later worked for the Washington law firm Duncan, Weinberg, Genzer & Pembroke, died June 14 at Suburban Hospital in Bethesda. He was 83.

The cause was complications from renal failure, said his son Dr. Richmond Allan.

Mr. Allan, a Rockville resident, joined Duncan, Weinberg, Genzer & Pembroke in 1979. He specialized in public land issues and Indian affairs cases. After his retirement in 2002, he continued to work with the firm as a consultant.

Earlier in his career, he was a partner at the now-defunct law firms Weissbrodt & Weissbrodt and Casey, Lane & Mittendorf. From 1965 to 1969, he was a solicitor for the Bureau of Indian Affairs at the Department of the Interior.

Richmond Frederick Allan was born in Billings, Mont. He received a bachelor’s degree in 1955 and a law degree in 1957, both from the University of Montana. He was a Fulbright scholar in London in the late 1950s and was an assistant U.S. attorney in Montana before moving to the Washington area in 1965.

He was a member of Phi Kappa Phi honor society and the Izaak Walton League of America conservation group.

His wife of 55 years, Dorothy Frost Allan, died in 2009.

Survivors include three sons, Richmond Allan of Spartanburg, S.C., David Allan of Lititz, Pa., and Michael Allan of Bethesda; a sister; and four grandchildren.

— Megan McDonough