The Tom Thumb steam locomotive in operation, 1830, Eye-witness account by observer John Latrobe TEXT

The boiler of Mr. Cooper's engine was not as large as the kitchen boiler attached to many a range in modern mansions. It was of about the same diameter, but not much more than half as high. It stood upright in the car, and was filled, above the furnace, which occupied the lower section, with vertical tubes. The cylinder was but three-and-a half inches in diameter, and speed was gotten up by gearing. No natural draught could have been sufficient to keep up steam in so small a boiler; and Mr. Cooper used therefore a blowing-apparatus, driven by a drum attached to one of the car wheels, over which passed a cord that in its turn worked a pulley on the shaft of the blower...

Mr. Cooper's success was such as to induce him to try a trip to Ellicott's Mills; and an open car, the first used upon the road, already mentioned, having been attached to his engine, and filled with the directors and some friends, the speaker among the rest, the first journey by steam in America was commenced. The trip was most interesting. The curves were passed without difficulty at a speed of fifteen miles an hour; the grades were ascended with comparative ease; the day was fine, the company in the highest spirits, and some excited gentlemen of the party pulled out memorandum books, and when at the highest speed, which was eighteen miles an hour, wrote their names and some connected sentences, to prove that even at that great velocity it was possible to do so. The return trip from the Mills - a distance of thirteen miles - was made in fifty-seven minutes.

But the triumph of this Tom Thumb engine was not altogether without a drawback. The great stage proprietors of the day were Stockton & Stokes; and on this occasion a gallant gray of great beauty and power was driven by them from town, attached to another car on the second track - for the Company had begun by making two tracks to the Mills - and met the engine at the Relay House on its way back. From this point it was determined to have a race home; and, the start being even, away went horse and engine, the snort of the one and the puff of the other keeping time and tune.

At first the gray had the best of it, for his steam would be applied to the greatest advantage on the instant, while the engine had to wait until the rotation of the wheels set the blower to work. The horse was perhaps a quarter of a mile ahead when the safety valve of the engine lifted and the thin blue vapor issuing from it showed an excess of steam. The blower whistled, the steam blew off in vapory clouds, the pace increased, the passengers shouted, the engine gained on the horse, soon it lapped him - the silk was plied - the race was neck and neck, nose and nose - then the engine passed the horse, and a great hurrah hailed the victory.

But it was not repeated; for just at this time, when the gray's master was about giving up, the band which drove the pulley, which drove the blower, slipped from the drum, the safety valve ceased to scream, and the engine for want of breath began to wheeze and pant. In vain Mr. Cooper, who was his own engineman and fireman, lacerated his hands in attempting to replace the band upon the wheel: in vain he tried to urge the fire with light wood; the horse gained on the machine, and passed it; and although the band was presently replaced, and steam again did its best, the horse was too far ahead to be overtaken, and came in the winner of the race.