The Book of Household Management by Mrs. Beeton

223. IF FISH IS TO BE FRIED OR BROILED, it must be dried in a nice soft

cloth, after it is well cleaned and washed. If for frying, brush it over with egg, and sprinkle it with some fine crumbs of bread. If done a second time with the egg and bread, the fish will look so much the better. If required to be very nice, a sheet of white blotting-paper must be placed to receive it, that it may be free from all grease. It must also be of a beautiful colour, and all the crumbs appear distinct. Butter gives a bad colour; lard and clarified dripping are most frequently used; but oil is the best, if the expense be no objection. The fish should be put into the lard when boiling, and there should be a sufficiency of this to cover it.