Original: This new order grew in population over the ensuing decades , during which the Duke of Manchester was in 1861 recruited as Grand Prior and a national hospitaller organization was formed when the Order of St. John acquired a corps of ambulances .
Simplified: This new order grew in population , and in 1861 the Duke of Manchester was recruited as Grand Prior and a national hospitaller organization was formed when the Order of St. John acquired a corps of ambulances .