I believe that Lothar is simply out of his mind concerning this. The death of his brothers made him crazy in certain respects. Be that as it may, he believes in Alchemy, and phant’sies that if Egon had stayed in Leipzig a few years longer he might have imparted to Lothar the secrets of Creation. Lothar has not ceased to pursue those secrets himself, by his own methods, in the thirty-some years since.