A railway carriage had been left for some weeks out of use in the station at Giessen, Hesse Darmstadt, in the month of May, 1852, and when the superintendent came to examine the carriage he found that a black redstart had built her nest upon the collision spring; he very humanely retained the carriage in its shed until its use was imperatively demanded, and at last attached it to the train which ran to Frankfort-on-the-Maine, a distance of nearly forty miles. It remained at Frankfort for thirty-six hours, and was then brought back to Giessen, and after one or two short journeys came back again to rest at Giessen, after a period of four days. The young birds were by this time partly fledged, and finding that the parent bird had not deserted her offspring, the superintendent carefully removed the nest to a place of safety, whither the parent soon followed. The young were, in process of time, full fledged and left the nest to shift for themselves. It is evident that one at least of the parent birds must have accompanied the nest in all its journeys, for, putting aside the difficulty which must have been experienced by the parents in watching for every carriage that arrived at Giessen, the nestlings would have perished from hunger during their stay at Frankfort, for everyone who has reared young birds is perfectly aware that they need food every two hours. Moreover, the guard of the train repeatedly saw a red-tailed bird flying about that part of the carriage on which the nest was placed.