1) From the verb ‘to sage’, the dialect equivalent of ‘sawn’.
1658 sagon timber aboute the house, Beckwith
1689 new Sagen bords and 2 ash baukes, Ł3, Barnoldswick
1693 all the sagen wood and riven speakes, Holmfirth. In the Colne Bridge forge accounts for 1729 are entries for lordings and polls felling and saiging.