Callaway of the Westerleigh goods train meanwhile informed the Charfield stationmaster of the crash, the stationmaster arriving at 5:38 am, only eight minutes after Callaway had called him. Having established that Button had informed Booking and Smith of the obstruction, the stationmaster quickly informed the heads of LMS before making a human chain of rescuers to haul buckets of water to the fire whilst allowing people to take axes to cut their way into the wrecked train. The first doctors from Wotton-under-Edge arrived at 6:20 am whilst a special train carrying doctors arrived from Bristol at 7:17 am. After extracting themselves from the coal, both Aldington and Want made their way to Button's signalbox and said "What is the meaning of this? Your distant was off!" but Button replied that such a thing was impossible. Button was correct, as he could not have 'pulled off' any down signal, and while the down distant showed clear via the repeater, this was found to be due to debris on the actuating cables and the weight of the debris was not enough to lower the blue lens (semaphore signals were lit with paraffin oil lamps at the time, which gave a distinctly yellowish flame - a blue lens covering the lamp would result in a green light being shown) to show the green light Want claimed to have seen. When Want and Aldington were sent to trial for manslaughter, neither attempted to excuse themselves because of the poor weather or lack of fogmen, but rather put emphasis on the fact that the distant signal was at clear. Aldington said when the mail train was approaching Charfield, he was standing behind Want who was keeping his eyes out for signals which both saw as green. Because of this, Aldington assumed the station was clear of traffic and could proceed through to Wickwar. However, error by Button was ruled out in the investigation, since Button's signals would not be able to change the down distant due to the GWR Train occupying the section. The only possibilities were that Aldington and Want did not see the down distant, or that they saw the signal, which had been somehow set to green. The only way the latter could occur was if something heavy weighed down the cables, or if they had been sabotaged. However, no traces of either were found and the mystery remains to this day.