I read an article about this sermon after the Archbishop gave it, and then some time after this (I don't remember when) I was under the understanding that Archbishop Lefebvre did take the sedevacantist position but then reverted back again to a cautious wait and see approach. For years I was still under this impression, that the Archbishop took the sede position for awhile, but I couldn't remember if I had read an exact quote of his where he himself declared the papacy to be vacant OR if it was something that someone else had told me.
Then a year ago or so I did a little googling and could only come up with this sermon which I read and studied, but I couldn't find a sermon or a writing online from ABL where he stated that he was definitely taking a sede position.
So, my question is: Does anyone know if he did take a sedevacantist position at some point and if he did, how long he remained in that position or did he only go as far as this cautious waiting position? Thanks.