Original sentence: (Hogan, 2006).(Masters, 1840)  The Ouse is fed by small rivulets and upland springs that rise on the western part of the island's northeast spur.(Ordnance, 2002)  This water body has been shown on early maps of the island in a very similar shape to its current geometry.M Hogan, Natural History of the Orkney Islands (2006).Ordnance Survey Map, Landranger, United Kingdom, 1:50,000 (2002).T, Masters, Orkney, Approaches to Kirkwall, HMS official survey map, 1840-1843
Edited sentence: The Ouse is fed by small rivulets and upland springs that rise on the western part of the island's northeast spur.This water body has been shown on early maps of the island in a very similar shape to its current geometry