The third map (map 3) copies the second, is carefully done, and gives essentially the same information, but varies in minor points. Cañizares remained in San Blas for several years after his visit to San Francisco. During this period his 1776 map was apparently redrawn by Manuel Villavicencio, in 1781, presumably under the supervision of Cañizares himself. Whether it is more accurate than the 1776 map is open to question. Small and capital letters are used for the localities on the map and in the legends. The letter describing the survey of the Bay was written by Cañizares and addressed to "Señor Capitan," obviously Ayala. It was dated September 7, 1775, "en este nuebo Puerto de S. Fran^{co} al abrigo de la Isla de Los Angeles." This document, which is an account of the first boat trip throughout San Francisco Bay, has never, to my knowledge, been published. Its intrinsic interest, consequently, as well as its bearing upon primitive geography and ethnography, warrants its presentation. A translation follows herewith. Various matters requiring comment are discussed immediately subsequent to the translation. _Cañizares' Report_ On the four occasions when I went out to explore this port and survey its northeastern and north-northeastern portion I discovered what is shown on the map and is set forth here. To the north-northeast of the Island of Los Angeles, at a distance of one mile, there is a bay which runs north-northwest to south-southeast. The distance across between the points which form it is about two leagues and its length two and one-half. In its northwestern part there are three little islets, forming with the coast a narrow channel, which is shut off at its southwestern mouth by a shoal. Around all the margin of the bay are folded hills, with very few groves of trees and these which there are consist in part of laurel and live-oak; there may be seen in the interior to the west-northwest a forest of trees, which from afar seem to be pines. In the middle of this sound there is situated a great high cliff with some submerged rocks on the northeast side. As the map shows its depth is sufficient for anchorage; it no doubt is a roadstead for such vessels as have good cables and anchors, for much trouble would be caused by the current which flows here and which would not be less than four knots.