what does “gramarye” mean?

[SFX: papers rustling, throat being cleared]

gramarye, n.

A facsimile reproduction of the Calendarium Naturale Magicum Perpetuum. [source]

\ ˈgræm • ə • rē \
Middle English gramarye, gramarie; a modification of Middle French gramaire grammar, grammar book, book of sorcery, from Old French gramarie, a variant of grammaire.

1. (obsolete) Grammar; learning.

And Lucerne seems (at least to me) / Fit circle for such gramarye…
—“Tour of Oliver Yorke’s Rhyming Cousin,” in Fraser’s Magazine for Town and Country (vol. XI, no. LXIV), April 1835. [source]

2a. (archaic) Mystical learning; the occult, magic, sorcery, necromancy.
2b. (archaic, obscure) A book of magic; a magician’s manual for invoking demons, angels, and the spirits of the dead. See also grimoire.

My mother was a weſterne woman / And learned in gramaryè…
—“King Estmere,” from Thomas Percy, Reliques of Ancient English Poetry, 1765. [source]

3. (literary, Arthurian, rare) The island of Britain.

It was England that came out slowly, as the late moon rose: his royal realm of Gramarye.
TH White, The Book of Merlyn, 1977. [source]