For a lucky few women, there was at least some promise of greater safety with the arrival of obstetrical forceps, which allowed babies to be repositioned mechanically. Unfortunately their inventor, Peter Chamberlen, chose not to share his invention with the world, but kept it secret for the sake of his own practice, and his heirs maintained this lamentable tradition for a hundred years more until forceps were independently devised by others. In the meantime, untold thousands of women died in unnecessary agony.