drafted by A. Forster. Relief shown by contours and spot heights. From: Geologic folio of a portion of the Haywards quadrangle / by Albert Forster. 1922. Accompanied by "Rod Book -- Party 15 Maillot Forster Area 17." (Forster1) and "Transit Book -- Party 15 Maillot Forster Area 17." (Forster2)