|[CHAPTER 23] [p.643]
Of the Manner in which they Reckon their Months and Days.
It is to be remarked that they consider twenty days as their week or month, counting in both the first and the last as being but one day, as if we should say there were eight days in the week, reckoning Sunday as both first and last. Also they count time from four years to four years, because they do not number their years higher. Also (a lacuna, * *)
In these festivals when the sacrifice is offered by the pontiffs, 62 they cover up their heads with certain white mantas on which they arrange white plumes, I mean on their heads, and they robe themselves in a painted shirt open in front, and in this manner they sacrifice.