F.M. Thorn, superintendent ; verified B.A. Colonna, assistant in charge of Office.
"Issued June 1886."
Relief shown by hachures and shading; depths shown by soundings.
Covers San Miguel Island, east part of Santa Rosa Island, and coastline north from Point Conception.
Oriented with north toward upper right.
Includes charts and notes on lighthouses, buoys, tides, etc.
"U.S.C. & G.S. 5300."
"Plate no. 1928."