No, Pere Hyacinth certainly does not seem to be too keen on the dogma of papal infallibility.
The question then becomes: Who in Hell is Pere Hyacinth?
He was a French heretic who left the priesthood to shack up with some woman. The Little Flower offered her final Communion to effect his conversion. She uncharacteristically flopped this time out. With a vicious child killer she was a roaring success. I think that there's a lesson in that for all of us.
Then the question becomes: Why in the name of all that is holy should we quote Pere Loyson as though he were a Doctor or a Saint or a Catholic?
It is like shooting trout in a bucket to demonstrate that what really bugs the opponents of Papal Infallibility is the existence of God and the establishment by His Son of a Holy Church with authority to bind and loose.