Harpy
2 of the 7 encyclopedias on this shelf carry an entry for Harpy. Both are reproduced below, so you can see where they agree and where they differ.
Aiton's Encyclopedia (1910)
har'py, a fabulous creature of Greek mythology. It had the body, legs, and talons of a vulture and the head and breast of a woman. The harpies are described as hideously fierce and filthy, with the habit of swooping down upon an outdoor feast, devouring the choicest viands, and defiling everything they could not eat. A descent of this sort is depicted in Virgil's Aeneid. Aeneas and his followers, after leaving Crete for Hesperia, make their first landing on the Strophades, the island of the harpies. They prepare a feast, having slain wild cattle for that purpose. They invoke the blessing of the gods and begin their feast, When from the mountain-tops, with hideous cry, And clatt'ring wings the hungry Harpies fly. The feast is defiled. Aeneas orders new meats to be prepared, but with the same result. This time they do battle with the harpies. While it is impossible to kill them they are at last driven away, but one Celaeno seats herself upon a "craggy cliff," curses Aeneas, and prophesies dire famine and other dread misfortune in Italy, foretelling that the Trojans will be reduced to such hunger that they will consume the very plates in their distress. Virgil tells in the seventh book of the Aeneid how this prophecy was fulfilled when the hungry men used pieces of bread for plates and then devoured the bread. Ascanius this observ'd, and smiling said. See! we devour the plates on which we fed.
Collier's New Encyclopedia (1921)
a fabulous creature in Greek mythology, considered as a minister of the vengeance of the gods. Various accounts are given of the numbers and parentage of the Harpies. Homer mentions but one, Podarge; Hesiod enumerates two, Aëllo and Okypete, daughters of Thaumas by the Oceanid Electra, fair-haired and winged mai winged maidens, very swift of flight. Three are sometimes recognized by later writers, who call them variously daughters of Poseidon or of Typhon, and describe them as hideous monsters with wings, of fierce and loathsome aspect, with their faces pale with hunger, living in an atmosphere of filth and stench, and contaminating everything that they approached. Vergil locates them in the Strophades. A harpy in heraldry is represented as a vulture, with the head and breast of a woman.