The practice of filling gaps between stones in a wall with small stone chips or flints, or the chips themselves used for this purpose.
From French 'galet' meaning pebble, likely from a Celtic root. The verb form developed in English during the medieval period when this stonework technique was common in English construction.
Galleting was absolutely essential in medieval England—it made stone walls stronger and weatherproof by preventing water from seeping between the large stones. You can still see beautiful examples in old English buildings where the small flints create decorative patterns!
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