General scholarship on Aleister Crowley and the A A, including published biographical and historical studies of the order, discusses Magister Templi as one of the highest publicly documented grades in the order's sequence, its Tree of Life number and Latin title recorded in the order's own periodical, The Equinox, alongside the rest of the published curriculum.
Crowley's own widely read essay on the order's general grade structure discusses the passage into this level of the Third Order as a significant conceptual threshold, a characterization documented in the order's published output and in the secondary literature on Crowley's writing rather than reconstructed independently here.
The direct correspondence between Magister Templi in the A A and the Golden Dawn's own grade of the same name and number is treated in the published scholarship on both orders as one of the clearest points of structural continuity between Crowley's system and the order he had left.
General biographical scholarship on Crowley also documents that he considered this level of the order's Third Order among its most significant, a characterization drawn from Crowley's own published writing rather than reconstructed from private material.