Iphigenia
3 of the 7 encyclopedias on this shelf carry an entry for Iphigenia. Both are reproduced below, so you can see where they agree and where they differ.
Collier's New Encyclopedia (1921)
in Greek legend, a daughter of Agamemnon and Clytemnestra. When the Greeks, going to the Trojan War, were detained by contrary winds at Aulis, they were in formed by Calchas, the soothsayer, that, to appease the gods, they must sacrifice Iphigenia to Diana, because her father the favorite stag of that goddess. Rather than shed the blood of his daughter, Agamemnon, as chief of the Grecian forces, commanded one of his heralds to order the army to disperse. After much solicitation from the other chiefs, Agamemnon consented, however, to immolate his daughter for the common good of Greece; but as soon as Calchas had taken the knife and was about to strike the fatal blow Iphigenia suddenly disappeared, and a goat of uncommon size was found in her place. This supernatural change animated the Greeks, the wind suddenly became favorable, and the combined fleets set sail for Aulis. Iphigenia's innocence had excited the compassion of the goddess Diana, who carried her to Taurica, where she intrusted her with the care of her temple, whence she subsequently fled with her brother Orestes and his friend Pylades.
Aiton's Encyclopedia (1910)
if-i-je-nia, in Greek legend, the daughter of Agamemnon and Clytemnestra. When the Greek army assembled at Aulis to set sail for Troy, Agamemnon, so runs the legend, was unlucky enough to kill a stag sacred to Artemis (Diana). The soothsayer Calchas made an announcement that the offense could be appeased only by the sacrifice of Agamemnon's daughter. Agamemnon was plunged in grief, but sent for his daughter on the pretence of marrying her to Achilles. When the virgin was placed on the altar and the fatal knife was in mid air Artemis snatched her away and substituted a hind in her place. The maiden was wrapped in a cloud and conveyed to Tauris, where she became a priestess in the temple of Artemis. See Orestes
1000 Classical Characters (1900)
A daughter of Agamemnon and Clytemnestra . When the Greeks, going to the Trojan war, were detained at Aulis by contrary winds, they were informed by a soothsayer that to appease the gods they must sacrifice Iphigenia to Diana . As the fatal knife was about to be plunged into her, Iphigenia suddenly disappeared, and a goat of great beauty was found in the place where she had stood ready for the sacrifice. 2026 Editor's Note: In some versions of the myth, Artemis rescues Iphigenia rather than allowing her death at Aulis. According to these accounts, the goddess brings her to the Taurians, where she eventually encounters her brother Orestes. Agamemnon's offense to Artemis stemmed from hunting and killing one of the goddess's sacred stags on his way to Troy. (Ed: BR 2026-07-07)