The practice or process of constructing with ashler stones; ashlar stonework (variant of ashlaring).
From 'ashler' plus the gerund suffix '-ing'. A variant form of 'ashlaring' reflecting the alternate spelling of the base word.
Different spellings of the same craft—'ashlaring' and 'ashlering'—both appear in medieval building records, showing how craftspeople wrote about their work using whatever spelling seemed right to them.
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