I am really quite ignorant about this topic. Are you saying that only one bishop ordained Marcel Lefebvre?... which is probably the norm. But then, why do other priests normally impose their hands on the newly ordained priest? Isn't that to ensure that apostolic succession is guaranteed? I never really thought much about this topic of our founder.
Re: +Lienart...Aren't those two references May 11, May 27 1976 readily available to listen to? "allegedly" could be verified and determined as fact, and further discussion can move on...
AI Overview

Archbishop Marcel Lefebvre was consecrated a bishop on September 18, 1947, in Tourcoing, France, by Cardinal Achille Liénart, the Bishop of Lille. The co-consecrators for the ceremony were Bishops Jean-Baptiste Fauret and Alfred-Jean-Félix Ancel.
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The episcopy is the Fullness of the Priesthood, but I appreciate your doubts. All this must have been scrutinized decades ago, no?
I'd like to make clear that
I do not doubt the orders of +Lefebvre or his line. It's not my intention to cast doubt on either, but to show that Tom is not applying his "standards" in an impartial manner.
Regarding priests imposing hands at ordinations..that is not essential to, and in no way affects, the
validity of the sacrament. Pius XII taught that it is the bishops imposition of hands that is required for validity