Such was the extent of Aztec power at the beginning of the 16th century, at the period of the Spanish incursion. NOTE.--The discrepancies in the dates assigned by several writers as to the periods of the emigration of various tribes and the reigns of their sovereigns, are carefully presented in the following table, given by Albert Gallatin, in his essay on the Mexican nations--1 vol. Ethnol. Soc. Transac. 162. Column Headings: A: _Alva._ B: _Sahagun._ C: _Veytia._ D: _Clavigero._ TOLTECS. A B C D Arrived at Huehuetlalpallan 387 Departed from do 596 544 They found Tula 498 713 720 Monarchy begins 510 667 Monarchy ends 959 1116 1051 CHICHIMECAS AND ACOLHUANS OR TEZCOCANS. {about Xolotl, 1st King occupies the valley of Mexico 963 1120 {1170 Napoltzin, 2d King ascends the throne 1075 1232 13 cen Huetzin} Tlotzin} 3rd King, so called erroneously, ascends the throne 1107 1263 14 cen Quinantzin, 4th King ascends the throne 1141 1298 14 cen Tlaltecatzin 1st King according to Sahagun ascends the throne 1246 Techotlalatzin 5th (2d, Sahagun) ascends the throne 1253 1271 1357 14 cen Ixtlilxochitl 6th (3d, Sahagun) " " " 1357 1331 1409 1406 Netzahual-Coyotzin 7th (4th, Sahagun) ascends the throne 1418 1392 1418 1426 Netzahual-Pilzintli 8th (5th, Sahagun) ascends the throne 1462 1463 1470 Netzahual-Pilzintli dies 1515 1516 1516 TEPANECS, OR TECPANECS OF ACAPULCO. Acolhua arrives 1011 1158 Acolhua 2d son of Acolhua 1st arrives 1239 Tezozomac son according to D'Alva, grandson according to Veytia of the 1st Acolhua arrives 1299 1348 1343 Maxtlan, son of Tezozomac arrives 1427 1427 1422 MEXICANS OR AZTECS. Mexicans leave Aztlan 1064 1160 " arrive at Huelcolhuacan 1168 " " at Chicomotzoc 1168 " " at valley of Mexico 1141 1227 1216 " " at Chapultepec {1248 1245 {1276