The Nahuatl lapidaries had at hand many varieties of workable and beautiful stone - onyx, marble, limestone, quartz and quartz crystal, granite, syenite, basalt, trachyte, rhyolite, diorite and obsidian, the best of material prepared for them by nature; while the Mayas had only limestone, and hard, tenacious rock with which to work it, and timber for burning lime.
The traditions agree with the monuments, whatever may be objected to assigning any one ruin to the Toltec, the Chichimec or the Nahuatl, that there are distinct varieties in ground-plan, motives, stone-craft, wall decorations and sculptures.
This language was called nahuatl, and one who spoke it as his native tongue was called nahuatlacatl, so that modern anthropologists are following native precedent when they use the term Nahua for the whole series of peoples now under consideration.
Brasseur died before he could realize his plan to publish the whole MS. in Nahuatl with a translation.
It has preserved in the conjugation and in the formation of the plural older forms than the classical Nahuatl itself.
The separation of the Pipils from the chief tribes of the Nahuatl branch happened centuries before the conquest, and they developed a singular and characteristic civilization, which can be seen in the wonderful stone-reliefs and sculptures of Sta Lucia de Cozumalhuapa on the Pacific coast of Guatemala.