(Documentary Artifact): Two b/w photographic prints of Roberto Thomson standing on the roots of a ‘Pescalama’ tree at Cave Canyon near the San Baltazar cave.
Notes on verso of prints:
Image 1: OP 14961-189/ 88:17050-189/ 13/ B/15-1/ Mulege/ April 1, 1926/ Root system of/ Pescalama tree/ at Cave Canyon./ B.C. 1926/ ROBERTO THOMSON STANDING ON ROOTS
Image 2: OP 14961-189/ 88:17050-189/ 15/ B/ 15-1/ 4/1/26/ Mulege/ Root system of/ Pescalama tree/ at cave canyon. Roberto Thomson standing on roots/
