Unfortunately the Latin was afflicted by a typo -- probably introduced by an autocorrection function at some stage of the process.
It should read
Dulcis agonista tibi convertit domus ista Pancrati memorum precibus memor esto tuorum
It was the 'r' on 'memor' which got lost.
I heartily recommend the book in which this motto is quoted: The King's Acheivent by Monsignor Benson, made available in a new printing from Silverstream Priory. You can read my review in the Autumn Mass of Ages and buy it from the LMS shop.
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