Gulf of California Showing Route of California Academy of Sciences 1921 Expedition

Amateur efforts to explore Baja California during the early 1920s.

This rather sparse map covers the waters of the Gulf of California and the adjacent coastlines of Sonora and Lower California in Mexico. The route of a 1921 expedition by California’s Academy of Sciences is noted, with a particular emphasis on the region’s numerous islands. Several insets are presented in the upper right. According to a 1922 report by C. Dallas Hannah (author of the map),

“In the Spring of 1921 the California Academy of Sciences sent a well-equipped scientific expedition to the Gulf of California. The purpose of the expedition was primarily to make as thorough study as possible of the fauna and flora of the islands in the Gulf and of certain important localities on the adjacent mainland…While several scientific expeditions have in the past visited the peninsula of Lower California, little attention has been given to the islands in the Gulf, of which the Coast survey charts name about 30.”

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