Jerome, Saint. Praefatio Hieronymi in Libros Samuel et Malachim in Patrologiae cursus completus. Series Latina (Patrologia Latina) 28.547-558

[Letter from Saint Jerome to Eustochium]
This prologue is intended as an introduction not only to Samuel and Kings, but to the whole Old Testament which Jerome translated from Hebrew to Latin, dedicating most of it to Paula and Eustochium, whom he addresses directly in it, though he clearly intends it also for a larger audience.
Online at Epistolae (Duplicated) (See also Bibliographia record).