Page:Vol 1 History of Mexico by H H Bancroft.djvu/755

Rh proved of great service to Cortés. One reason for their slower advance was the want of coöperation from the vessels, which had been of such great assistance on the Iztapalapan road. This was at once remedied by the detachment of three brigantines each for the Tlacopan and Tepeyacac camps.