In the passage just quoted Rufinus directly connects the publication of Hilary’s masterpiece, usually called the De Trinitate, with this work of reconciliation. After speaking of his success in it, he proceeds, ‘Moreover he published his books Concerning the Faith, composed in a lofty style, wherein he displayed the guile of the heretics and the deceptions practiced upon our friends, together with the credulous and misplaced sincerity of the latter, with such skill that his ample instructions amended the errors not only of those whom he encountered, but also of those whom distance hindered him from meeting face to face.’ Some of the twelve books of which the work is composed had certainly been published during his exile, and it is possible that certain portions may date from his later residence in Gaul. But a study of the work itself leads to the conclusion that Rufinus was right in the main in placing it at this stage of Hilary’s life; this was certainly the earliest date at which it can have been widely influential.