This query appears to refer to the title of a specific astrological text, likely by Toby S. Sullivan (or a similar work in a multi-volume series). The "Matr..." portion likely refers to Matrix (a common astrological term or software brand) or perhaps Materials .
While I can provide a general summary and details about the most likely match, this could also refer to a specific chapter or a technical manual. Primary Match: Astrology’s Mirror: Full-Phase Aspects
It may refer to a more technical, mathematical text involving Matrix Algebra applied to astrological aspects.
Sullivan suggests that the phase an aspect is in reflects the "evolutionary" stage of that specific planetary relationship.
