sentences:  The River Irvine rises in two head-waters, the one in a moss at Meadow-head, on the eastern boundary of the parish of Loudoun or of Ayrshire, and the other a mile eastward in the parish of Avondale in Lanarkshire, near the battle-field of Drumclog.About 2¾ miles (4.4 km) from the point it enters Ayrshire, Glen Water joins it from the north.Strictly speaking Glen Water is the parent stream, because it is longer and carries more water; for the Glen Water rises at Crosshill in Renfrewshire, a mile (1.6 km) north of the East Ayrshire boundary, and runs southward, joined by five rills (small streams) in its progress, to the point of confluence with the Irvine.