I have listed 7 mago glyphs from the G text, and the last one on side a is the 'prototype' for mago:

jaws closed
	Ga2-14	Ga3-23
open jaws
	Ga7-16	Gb6-11	Gb6-13	Gb7-13	Gb7-16

Ga7-16 is also the first of the mago with open jaws. The location and signs surrounding confirms that spring lies in the past:

Ga7-11	Ga7-12	Ga7-13	Ga7-14
Ga7-15	Ga7-16	Ga7-17	Ga7-18	Ga7-19
Ga7-20	Ga7-21	Ga7-22