Pausanias Description of Greece 7.18.11

[11] Every year too the people of Patrae celebrate the festival Laphria in honor of their Artemis, and at it they employ a method of sacrifice peculiar to the place. Round the altar in a circle they set up logs of wood still green, each of them sixteen cubits long. On the altar within the circle is placed the driest of their wood. Just before the time of the festival they construct a smooth ascent to the altar, piling earth upon the altar steps.

[11] The people-of-Patrai [Patreîs] celebrate every year a festival [ heortē] called Laphria, which is likewise intended for their [special kind of] Artemis, and, at this festival, there is a [special] way [ tropos] of sacrificing [ thusiā] that is peculiar-to-the-locale [ epikhōrios]. Around the altar [ bōmos] in a circle [ kuklos] they set logs-of-wood [ xula] still green [ khlōra], each of them sixteen cubits in length. On the altar [ bōmos] within the circle [ kuklos] are placed the driest of the logs [ xula]. Just before the right-time [ kairos] of the festival [ heortē] they create a smooth ascent [ anodos = an-hodos] to the altar [ bōmos], piling earth upon the ascending-steps [ anabasmoi] [to form a ramp].