[44] Abella evidently refers to Old River as the opening ("boca") on the left and to Middle River as that on the right. [45] Schenck (1926) places Coybos on the right bank of the San Joaquin not more than a mile or two below the junction of Middle River. It is probable, from Abella's account, that the village was farther down, nearer the mouth of French Camp Slough. Abella, furthermore, gives no indication on which side of the river the village was situated. [46] It is probable that the rancherias here described, and indeed the whole day's journey, was in the area just west of the present city of Stockton. [47] The first split in the river going downstream is west of Stockton, with the formation of Rough and Ready I. It is probable that the party was in this area. [48] The party apparently had reached the junction of the main stream--now the Stockton ship channel--and Old River, north of Mandeville I. The distance is about 15 mi. from Rough and Ready I., near Stockton, where the previous halt was made. The entrance to Old River is passed on the left going downstream. [49] The location of these villages cannot be ascertained with certainty. According to the text the party traveled about 1 1/2 leagues on the 24th and 6 leagues on the 25th, making 7 1/2, or perhaps 18, mi., if we can believe Abella's distances. There is very great question as to the route taken after the party reached the junction of the main river and Old River. Bancroft (1884-1890, II: 323, fn.) says the route passed through the sloughs just north of Sherman I. so as to enter the Sacramento R. This would imply the use of Threemile Slough, 3 mi. long, as its name implies. One alternative is Sevenmile Slough, which passes from the San Joaquin R., with Andrus and Brannan islands on the right and Twitchell I. on the left, to the Sacramento. Still another possibility is that Abella entered the Mokelumne R., just below the junction of the main river and Old River. If so, progress would have been necessary through the sloughs of Tyler and Andrus islands. None of these possibilities conforms in all respects to the account in the text. [50] They were still going north along a waterway not more than 100 ft. wide. [51] At this point the party evidently entered the main stream of the Sacramento.