Ahh, found it - https://en.wikipedia.org/wiki/Railway_speed_record#Steam https://en.wikipedia.org/wiki/Railway_speed_record#Steam. "Claimed" means it's surely t

Ahh, found it - https://en.wikipedia.org/wiki/Railway_speed_record#Steam https://en.wikipedia.org/wiki/Railway_speed_record#Steam. "Claimed" means it's surely to be taken with at least a grain of salt.