sentences:  This period, represented by the sculpted monuments, was a time when the great metropolis of Teotihuacan in the Valley of Mexico was exerting a strong influence across the Maya region.Although both Teobert Maler and Sylvanus Morley visited the nearby sites of Cancuen and La Reforma III in the early years of the 20th century, neither of them explored Tres Islas, a few kilometers upriver from La Reforma III.Maler's 1905 map mentions Tres Islas, but places it on the wrong side of the river.