In a letter dated 20 August 1628 Howell thanks Austin in extravagant terms for "that excellent poem ... upon the Passion of Christ" which "transported me into a true Elysium", and urges him to publish "the other precious pieces of yours which you have been pleased to impart unto me".
In 1635 there appeared a folio volume entitled titled "Devotionis Augustinianæ Flamma, or Certayne Devout, Godly, and Learned Meditations: written by the Excelently Acomplisht Gentleman, William Austin of Lincolnes Inne, Esquier."
Almost every page of the book displays a wide knowledge of the Bible and patristic literature, and justifies to some extent a friend's estimate of Austin as a gentleman highly approved for his religion, learning, and exquisite ingenuity.'
A second edition of the 'Meditations' was published in 1637, and its success encouraged Austin's friends to produce in the same year another of his works entitled 'Hæc Homo, wherein the Excellency of the Creation of Woman is described by way of an Essay,' 12mo.
Before 1671, a third work of Austin's, a translation of Cicero's 'Cato Maior, or the Book of Old Age... with annotations upon the men and places,' was published by a London stationer into whose hands the manuscript had accidentally fallen.