seilclathum

seilclathum [ME seilcloth, sailcloth], sail-cloth, cloth used for making sails (in quot. of windmill). 1352 in saylclathis empt' pro molend' de Fery, v s. et in reparacione molendini de Suthewyk cum saylclathis empt' pro eodem, xviij s. Ac. Durh. 553; 1423 in diversis rebus emptis pro husbandria et saylclazys Ac. Jarrow 95.