XEE4192753 Clotilde Sprengel and Zacharie Bergmann watch German doctor Petrus Schultz asleep in front of the 18th century. Engraving from 1871 in ???istoire Des Cocuses Celebres??????by Henry de Kock (1819-1892). by French School, (19th century); Private Collection; (add.info.: Clotilde Sprengel and Zacharie Bergmann watch German doctor Petrus Schultz asleep in front of the 18th century. Engraving from 1871 in ??????Histoire Des Celebres??????by Henry de Kock (1819-1892),); Stefano Bianchetti.