† quarter-fourn.Obsolete some kind of long pole or plank (cf. sense 19, and quarter-boardn.).
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1776 G. SempleTreat. Building in Water 66 Take a Carpenter with you at low tide, and let him bring a Hand-spike..and a nine Foot Pantile-lath or a Quarter-four..and I will venture..he can thrust down the Pantile-lath to the Rock.