The authorship of this document is something of a mystery. The copy in the Bancroft Library has the title given above but is in the handwriting of, and signed by, Gervasio Argüello, who was not a member of the expedition. If it is Father Abella's actual diary, then how may one explain the references to "Father Ramón," "the two priests," etc.? Furthermore, the diction is confused and ungrammatical, unlike what one would expect of a literate priest. Certain passages give the impression of a third person who is involved. My own feeling is that Father Abella kept some sort of record but that these notes, plus a verbal account by Sergeant José Sanchez, the military commander of the expedition were worked over by Gervasio Argüello into a day-by-day account which has the semblance of a diary. Credit for the leadership of the expedition, of course, remains with Father Abella. Exploration of the Eastern Shores of upper San Francisco Bay, San Pablo and Suisun Bays and of the lower Sacramento and San Joaquin Rivers. _15th day._ At ten o'clock in the morning we set out from the wharf at the port and stopped at Angel Island because the tide was running out.[17] At about four in the afternoon the tide turned and was favorable. We set out, arrived at the Point of the Huchiunes, and stopped on the south side of that point. We went during the entire day about five hours, all at the oar in a calm sea. Angel Island, the Point of the Huchiunes, and that of the Abastos form a bay equal in size to that of the Port.[18] It contains eight islands, most of which are small. One of them, which has to be passed in navigating to the Point of the Huchiunes, has a sand bar, and it is necessary to pass a little away from it to the west. It is recognizable only when a bearing is taken. The west side [of the island] is covered with trees. _16th day._ We set out from the above-mentioned Point of the Huchiunes, which we called Point San Pablo. Where we slept is a fairly good beach with water and firewood where one may stop. This Point San Pablo has opposite to it another point which we called San Pedro and halfway between are two little islands. From one point to the other will be about twice the distance as from the fort to the other shore.[19] These two points enclose the bay which we have mentioned, and form another, much larger, which we estimated to extend four leagues. From the center to the periphery this bay is square. On the northern side and the western it has five villages, which are still heathen. On the western side is a cove, according to the Indians quite large, but Ensign Gabriel Moraga has twice reached its head in the expeditions he has carried out in these parts.