There are two groups of seven faces. What are they? (From Book 2 Chapters 21-24)

The "sea" of people at the prison are described literally and figuratively. There were,

" seven newly liberated prisoners, and seven murdered men who died at the hands of the angry mob: "Seven prisoners released, seven gory heads on pikes, the keys of the accursed fortress of the eight strong towers, some discovered letters and other memorials of prisoners of old time, long dead of broken hearts --such, and such-like, the loudly echoing footsteps of Saint Antoine escort through Paris streets in mid-July, one thousand seven hundred and eighty-nine. Now, Heaven defeat the fancy of Lucie Darnay, and keep these feet far out of her life! For, they are headlong, mad, and dangerous; and in the years so long after the breaking of the cask at Defarge's wine-shop door, they are not easily purified when once stained red."