Looking for Tigers in Chitwan, Nepal

Royal Chitwan National Park is a major game preserve in Nepal, home to one-horn rhinos, Bengal tigers, elephants and other wild game. It is a fascinating park, whose boundaries included prairie, bush-land, and the Rapti River, and it is home to several native villages. It was a wonderful experience, along the Rapti River, exploring the wilds on an elephant and visiting the elephant breeding ground and nearby villages. People were wonderful, simple folk - but alas we didn't see any tigers.