On the martyrs’ baptism of blood, cf. Eus. vi. 4, on the martyrdom of the Catechumen Herais.  So St. Cyril, of Jerusalem (Cat. Lect. iii. 10), “If a man receive not baptism, he has not salvation; excepting only the martyrs, even who without the water receive the kingdom.  For when the Saviour was ransoming the world through the cross, and was pierced in the side, He gave forth blood and water, that some in times of peace should be baptized in water; others in time of persecution, in their own blood.”  So Tertullian (In Valentin. ii.) of the Holy Innocents, “baptized in blood for Jesus’ sake” (Keble), “testimonium Christi sanguine litavere.”