Sermon trafficking

I've just been informed of a terrible epidemic rampaging through the clerical population:

...It has sometimes been recommended to the younger clergy to transcribe printed sermons for a season, till they shall have attained an ability to compose their own.  And it is to be lamented that this advice has been too strictly followed: for, when they have once formed this habit, they find it very difficult to relinquish it: the transition from copying to composing of sermons is so great, that they are too often discouraged in their first attempts, and induced, from the difficulty they experience in writing their own sermons, to rest satisfied in preaching those of others.  Hence has arisen that disgraceful traffic in printed sermons, which, instead of meeting with encouragment from the clergy, ought to have excited universal indignation.

--Charles Simeon, Claude's Essay on the Composition of a Sermon; With Notes and Illustrations, Together with One Hundred Skeletons, Being the Substance of Sermons Preached Before the University..., new ed. (London: S. Cornish and T. Allman, 1837), v.  The "Claude" in question is Jean Claude, a seventeenth-century Huguenot; for an example of the earlier dissemination of his work in Britain, see Gina Luria Walker.