It is said that John Milton's Lycidas, Percy Bisshe Shelley's Adonais: An Elegy on the Death of John Keats and Alfred Tennyson's In Memoriam are the three greatest elegies in English. Some adds Matthew Arnold's Thyrsis as the fourth greatest elegy. No one says that John Dryden's To the Pious Memory of the Accomplished Young Lady Mrs. Anne Killigrew (hereafter Killigrew)is one of the greatest elegies. But it should be thought an important elegy. As Lycidas was written in 1637 and Adonais in 1821, the year when Killigrew was written is placed in between the two, for the elegy Killigrew was written in 1686. Nobody know the reason but Killigrew has some of the characteristics of both Lycidas and Adonais. A pastoral elegy usually has one of the two constructions:one is focused on the reincarnation of the dead person and the other is focused on the dead person's acquiring an eternal life. Milton's Lycidas took the former construction and the speaker's dead friend, Lycidas was born again in reply to the shepherd's calling. Shelley's Adonais took the latter construction and the speaker's dead friend, John Keats became one of the bright star,Lucifer and acquired an eternal life. Dryden's Killigrew begins with the atmosphere of the former but ends with the circumstance of the latter. In the beginning the elegy presents pastures and such evergreen trees as palms, which is the same as Lycidas which begins with presenting pastures and such evergreen trees as laurels,myrtles and ivy. At the end, the elegy shows that the dead person Killigrew becomes a star and has an eternal life. This is very similar to Adonais's progression. This means that the elegy Killigrew has the role of a bridge between Lycidas and Adonais. That is why we should think of the elegy Killigrew as one of the most important elegies in English.