The Wardha valley proper includes but a small proportion of the District, consisting of the rich Amner pargana in the north-west of Katol. But its tributaries drain the bulk of the Katol tahsil, a halt of Nagpur and a small part of Umrer. The principal of these are the Bor, the Wunna, the Jam and the Kar. The Bor rises in the hills near Bazargaon and rushes down a winding and rocky channel between the Kondhali uplands and the Kauras plateau, passing into Wardha to join the Wunna. Its narrow valley is very fertile and the high well-wooded cliffs on either side render it the wildest and most beautiful spot in the whole of the District. The Wunna rises near the hill of Mahadagarh in the Pilkapar range and flows along the northern base of the Kauras plateau past Hingna and Bori where it is crossed by the Great Indian Peninsula Railway. It leaves the District at Ashta. The small Krishna River joins it at Bori and it was in this stream that the Reverend Stephen Hislop was drowned in 1863 while endeavoring to cross it in flood. The Jam rises among the hills south of Kondhali and flowing northwards into the centre of the Katol tahsil, takes a westerly turn past Katol and joins the Wardha at Jalalkhera. The kar rises in the same range, but flows directly south-west, separating the Wardha and Nagpur Districts till it joins the Wardha River at Khargarh, the trijunction point of the two Districts with Berar. The Nand flows across a small strip in the south of the District and joins the Wunna beyond the border of Wardha.