Trevor Fishlock takes a green route through north Cardiff, discovering some of the more unusual creatures who have made their home in Roath Park lake.After hearing the stories of Cardiff's Old Jewish Cemetery, he heads to Cathays to find out about some of the more unusual burials in the large graveyard there. In one plot lies only a leg - the rest of the body is buried elsewhere.Trevor talks to John Farnhill about the Friends of Cathays Cemetery, a group of local historians who are dedicated to researching the stories behind the names on the gravestones.The cemetery is also the final resting place of a remarkable woman, Frances Batty Shand. The daughter of a slave, her dedication and compassion would see her change the lives of countless people across the city.