1) Of Old English origin, meaning to bale, that is to remove water by taking it up with some suitable container.
1579 the lading of water, Elland
1682 pd for ladeing in the water ... 6 days, Rotherham
1704 Paid for watter lading, Farnley
1760 Pd for a bowl to lade water 1s 0d, Candles to Lade water by 1s 6d, Tong. In coal-mining it was a primitive method of draining and can be linked with ‘teem’.