And it was not only the railways which he had in his charge. All the motor services were brought under his control as well. It was a bewilderingly complex affair; and he had to act as a kind of liaison centre between the two departments, clearing up any troubles which arose and co-ordinating the twin methods of transport. I think he had the power of mental visualisation developed to an abnormal extent; and his memory must have been quite out of the common. To assist him, he had the largest railway map I have ever seen--it covered a whole floor--and on it were placed blocks of metal showing the exact situation of every truck, carriage and locomotive in the kingdom. These were moved from time to time by his assistants in accordance with telegraphic information; and if he doubted his recollections at any moment he could go and study the groupings upon it. I remember seeing him once when things had got slightly out of gear, his hands full of telegraph forms, his feet encased in felt slippers to avoid marking the surface of the map, studying a point in the Welsh system where a number of trucks had been stranded in sidings. With the briefest consideration he seemed to come to a decision, for he gave his orders to an assistant: “Locomotive, Newport to Crumlin, _via_ Tredegar Junction. (It can’t go through Abercarne, because the 3.46 is on the line now and I don’t want to waste time shunting.) Then on to Cwm--C-w-m--to pick up twenty-seven trucks in the siding. All right. After that, back to Aberbeeg--b-double-e-g--since the line is blocked at Victoria by No. 702. Then Blaina--B-l-a-i-n-a--and Abergavenny. All right.... Stop a moment. Map-measure, please. Motor Fleet 37 will be at Abergavenny about then with some stores for the North. Hold train at Abergavenny and wire them to stop No. 37 as it passes. That will fill up ten trucks, I think. All right. Train Hereford, Birmingham, via Leominster. Load twelve trucks Birmingham. Tamworth, pick up five truck-loads--food, that red block there--then North behind No. 605. All right. Then wire Abergavenny to send No. 37 to Monmouth. They’ll get their orders there. All right.” So it went on, I am told, hour after hour, throughout the day. Even the details of the diurnal traffic were not sufficient; for as he went along, he planned the night-operations as well. When he retired for the short sleep-time which he took, every point had been regulated for the ensuing five hours.