Philip Neale, Littell's Living Age — Volume 166…
“ On ascending rising ground, or on any other occasion when the speed is slackened, at a shrill cry from the driver these runners jump down and run swiftly to the ponies’ heads. There, partly by an application of the short whips which they carry, but more especially by their noisy shouts, they urge on the ponies again, and at length, when the pace is increased, tired and breathless with their exertions, they scramble up behind as the carriage at full speed rolls past them. ”
