Conservation mended a and b together. It is now a single piece.
Loans:
S1966-1967 #52: Department of Anthropology (UC Berkeley)/A. Van Dusen Eggers (January 2, 1967–unknown), S1968-1969 #9: Department of Anthropology (UC Berkeley) (July 28, 1967–August 9, 1968), and S1978-1979 #54: California State University, Chico (March 27, 1979–February 22, 1980)