Sentence:  And however "Firmilian" and S. "Cyprian" might be deceived in the thinking hereticks quite loſt their orders ; yet in this they were untouched, that although their ſuppoſition was queſtionable, yet their ſuperſtructure was not meddled with, "viz." That if they had been Lay-perſons, their Baptizations were <WSD>null</WSD> and invalid. 
Meaning of the word marked with <WSD> tags:  Having no validity; "null and void"