Principal English Translation:
the place where the vanguard merchants, who were seeking trade goods and helping expand the empire, had to turn back; they could not enter the province of Anahuac; only the Mexica of Tenochtitlan and Tlatelolco and their companions from Cuauhtitlan and Churubusco could penetrate beyond Tochtepec
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 9 -- The Merchants, No. 14, Part 10, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1959), 49.
Attestations from sources in English:
Tochtepec, a place that was recognized as a gateway to the province of Anahuac, had a house that belonged to the Tlatelolca, where the vanguard merchants were invited to a banquet. They would arrive bearing gifts, such as chocolate beaters (acacuahuitl), that were borne on the backs of human carriers.
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 9 -- The Merchants, No. 14, Part 10, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1959), 51.