As soon as they were settled at the hotel a carriage was ordered for a drive around the island by the "Paseo Coral," as the encircling road is termed. For much of the way the drive was through, or close upon, the tropical forest, and the youths were more than once reminded of their excursion in Singapore, and the ride in Ceylon from Point de Galle to Colombo. On one side of the island there was a view of the ocean, while on the other the scene included the dense swamp and series of islands lying between them and the mainland, with an occasional glimpse of the mountains that form the dividing ridge between the Atlantic and Pacific. The Doctor's scientific ardor was roused by the numerous shells with which the beach was strewn, and several times he stepped from the carriage to gather specimens for his cabinet of conchology. The youths looked longingly at the bananas and other fruits which grew in abundance, but they heeded the advice of their mentor, and abstained from indulging. Aspinwall is not a healthy place at best, and the dangers of a stay there are greatly increased by an intimate acquaintance with the products of its gardens, when one has freshly arrived from a sea-voyage. [Illustration: DEPARTURE FOR PANAMA.] On returning from their excursion our friends went to deliver letters to one of the officials connected with the canal company's works, but, not finding him, they went to the railway terminus to witness the departure of the train for Panama. The passengers, mails, express matter, and "fast" freight had been loaded as expeditiously as possible into a train of eight or nine cars, and when all was ready the usual signals were given, and the locomotive moved off with its burden. One of the officers of the steamer had joined our friends, and explained that it was the custom of the company to despatch a special train on the arrival of a steamer, whether from Europe or America, in addition to the regular trains that were sent each way daily. Sometimes five or six trains were sent off in a single day, but such occurrences were unusual.