Hi Gascoing,I will give it a shot. Please realize I am not an armour scholar so am uncertain as to how it will translate. This is a first pass to make some sense of it. I am sure there will be others to weigh in on the topic and correct anything that I may have misinterpretted.
Jenn
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"hym nedeth also a petycote of an overbody of a doublett, his petycote wt oute sieves, ye syses of him 3 quarters aboute wt outen coler. And that other part noo ferther thanne ye waste wt streyte sieves and coler and cutaine oylettes in ye sieves for ye vaunt bras and ye Rerebrase
He needs also a short coat of an overbody of a doublet, his short coat without sleeves, the sizes him 3 quarters about without a collar. And that other part no further than the waist with straight sleeves and a collar and a cutaine(contains?) eyelets in the sleeves for the vambrace and the rebrace.
Armed in this wise First behoveth Sabatouns grevis & cloos quysseux wt voydours of plate or of mayle & a cloos breche of mayle wt 5 bokles of stele ye tisseux of fyne lether. And all ye armyng poyntes after they ben knytte & fastened on hym armed that ye poyntes of him be kutte of
Armed in the way first behoveth (behooves?) sabatons greaves and close gussets with voiders of plate or of maille and a close {i]breche[/i](breaches or skirt?) of maille with 5 buckles of steel the tissue (straps?) of fine leather. And all the arming points after they been knytte (knit/tied?) and fastened on him armed that the points of him be cut off
NOTE: without the full sentence, I am not sure if 'of' = off in this case.
And thanne a paire of cloos gussetts strong sclave not drawes and that ye gussetts be thre fingers withinne his plates at both assises And thanne a paire of plattes at xx li lib weight his breste & his plats enarmed to wt wyre or wt poyntes."
And then a pair of close gussets strong sclave(?) not drawes (?) and that the gussets be three fingers within his plates at both assises(both sides?). And then a pair of plates at xx li lib <20 lbs? in weight?> weight his breast and his plates attached to it with wire or with points.
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