The Book of Household Management by Mrs. Beeton

290. Put them in a tub, and cover them with salt and water. Let them

remain for 12 hours, when they are to be taken out, and allowed to stand for another 12 hours without water. If left without water every alternate 12 hours, they will be much better than if constantly kept in it. Never put the same water twice to them. OYSTERS FRIED IN BATTER.