A Complete Guide to Heraldry by Arthur Charles Fox-Davies

12. Sir Gaston de Foix, Count de Longueville, &c., K.G., 1438-1458. Arms:

quarterly, 1 and 4, or, three pallets gules; 2 and 3, or, two cows passant in pale gules, over all a label of three points, each point or, on a cross sable five escallops argent. Crest: on a wreath or and gules, a blackamoor's bust with ass's ears sable, vested paly or and gules, all between two wings, each of the arms as in the first quarter. Mantling paly of or and gules, lined vert.