To bring the yards more square to the fore and aft line(verb)
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Use "brace in" in a sentence
""His reins lay secured to the pommel-like brace in front of him."
"There is beyond this, ffine woods and a delicate Parke above the house – pailed in; yt is stored with deare both red and ffallow and affords 12 brace in a season, there are also fine Coppices."