1. Map of the ’Great Blue-Gravel Lead’ of Northern California /by J. P. Marker Creator: Marker, J. P Published / Created: undated Call Number: WA MSS 328 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Map of the ’Great Blue-Gravel Lead’ of Northern California /by J. P. Marker