under the altar are beasts expressing the vices as peacock, cameleon and lion;
And later:
Q. What do the animals signify represented under it?
A. That shows us that before entering into such a beautiful quarry, one has to tred down all vices.
Thus says the Latomia document 175-t-e. This document is a translation of Cayers Maçonniques (National Library of Australia, MS 1097/44), which is the first volume of Maçonnerie des Hommes, the other five volumes are in the Kloss collection in Den Haag in the Netherlands.
The concerning degree is called “Apprentice Mason of Practice” and is the fourth degree presented in this volume (after Entered Apprentis, Fellowcraft and Master Mason).

Also see peacock.
Cayers Maçonniques (National Library of Australia, MS 1097/44) Latomia 175-t-e