Several small towns and ranches are scattered along the banks of the river. The first is Gatun, ten or twelve miles above Chagres. About ten miles further is Dos Hermano; further on, Pûro Blanco, and Palenquillá last, about two-thirds of the way to Gorgona. These are stopping places for the canoes, where refreshments and supplies can be procured. At night, parties that land are compelled to build fires to keep off the wild beasts and venomous serpents, which abound in the neighborhood of the river, and to disperse the myriads of insects with which the air teems. Alligators of a large size, are to be seen lying on the banks in the day time, basking in the sun. Above Palenquillá are some powerful currents, which it requires considerable toil to move against. The river is in some places a half a mile wide, and in others, not more than thirty yards. The boatmen are exceedingly indolent, and require constant driving and coaxing to keep them moving; but sometimes, when they are prevailed upon to go to work, they will exhibit an endurance and perseverance almost astonishing. They have been frequently known to work at the poles, pushing the boat along, for twenty-four hours, without rest. The difficulty of ascending the Chagres river, may be appreciated, when it is stated, that although Gorgona is only fifty miles from the town of Chagres, it frequently occupies as high as forty hours for the canoes to reach that place. Stoppages are, of course, numerous, both on account of the tiring of the boatmen and for refreshment.