Complex sentence: Robert Wallace Urie (22 October 1854-6 January 1937) was a Scottish locomotive engineer who was the last chief mechanical engineer of the London and South Western Railway following the retirement of Peter Drummond in 1913 until his own retirement at the grouping of 1923.
Split into simpler sentences: Robert Wallace Urie (22 October 1854-6 January 1937) was a Scottish locomotive engineer who was the last chief mechanical engineer of the London and South Western Railway. Following the retirement of Dugald Drummond in 1913 Urie became chief mechanical engineer until his own retirement at the grouping of 1923.