But since you ask for sources ad that is a good thing ad I aplaud you for that here .
.Henry Charles Lea
In the preface to the second edition of Lea’s work (1907), the editor (?) states:
During the forty years which have elapsed since the appearance of the first edition of this work*, and the twenty-three since that of the second, much has added to our knowledge of the past and many changes have occurred in the present… the author had made no special preparation for recording and incorporating this new material, but has endeavoured to respond to the call by such revision and alteration as his other engagements have permitted.
*NB: the first edition is dated 1867
In other words, it was already inaccurate and out-of-date in 1907. Wanna take any guesses how much more inaccurate and more dated it is today, an additional hundred years later?
Moreover, he makes a claim that even you have dismissed here: “prior to the sixteenth century the fathers of the Church had no scruple in admitting that in primitive times the canon had no existence and the custom was not observed.” This gross inaccuracy should cause us to be
very suspicious of his research and conclusions.
His life story is quite interesting: his work on the Spanish Inquisition spurred some to accuse him of anti-Catholic bias (see Dewey’s “The Last Historian of the Inquisition”). His oeuvre seems to be as much polemics as historical inquiry: in Cheney’s
On the Life and Works of Henry Charles Lea, he writes, “to most scientific historians it seems no more within their province to express ethical judgments on the men and institutions of the past… Mr Lea did not feel so.” He quoted a preface of one of Lea’s books in which he had written, “no serious historical work is worth the writing or the reading unless it conveys a moral… I have not paused to moralize, but I have missed my aim if the events narrated are not so presented as to teach their appropriate lesson.”
In other words, Lea is not presenting an objective historical narrative, but instead, presents his own opinions (as a non-Catholic) about clerical celibacy. Hardly the kind of source we might wish to use in order to draw reasonable conclusions.