Roath Tithe map of 1840 Published October 7, 2018 at 1458 × 1080 in Roath Tithe map of 1840 The Tithe map of 1840 showing the mill circled in red and the mill pond upsteam from that. Note the stream overflow going around field 266 and down what is now Marlbourough Road, infront of St Margaret’s Church (1740 before rejoining the stream.