_St. Augustine_, March, 1877.--The work of enlivening the old town, for the delectation of visitors and excursionists from other points, was undertaken here to-day. Everybody was merry, and it was almost incredible to see the number of dignified persons, on other occasions, so completely carried along with the tide of simple sight. All, apparently, had their laugh set on trigger, ready to go off with the slightest vibration in the air. The streets and sea-wall of St. Augustine, together with the balconies, windows, and doors, in the vicinity, were the scene of preparation for a grand gala-day of sight-seeing. The vessels in the harbor were dressed in flags of every nationality, and waved free as the winds that tossed them to and fro. The post-band played stirring strains, containing more sound than sweetness, to quicken the impulses of the occasion. At a given signal, cannons were fired, when a fleet of snowy sails shot out from the wharf, resembling a flock of sea-gulls. The yacht-racing opened the day's sport. They all sailed swiftly when first under way, but one after another kept falling off and dropping behind, until the Wanderer and Seminole were left alone to decide the contest. They moved like something possessed with life, more than canvas spread to the breeze for power to propel them. Finally the Wanderer won, amid the wildest shouts of joy from every side, and many congratulations for the owner. The cannons fired with as much demonstration as though a great battle had just been decided. A horse-race was announced as the next excitement. Eight jockey-dressed men and boys of different hues, mounted on bare-backed horses of undistinguishable pedigree, but marsh tackey predominant, were ready for the curriculum. They darted off with the speed of a Grecian hippodrome, when they imitated the gait of almost every untrained quadruped. On the home-stretch two of the riders rolled off easily, as though it was a portion of the programme for which they were prepared. Then came the hurdle-race, with the hurdles woven from cedar and scantling. The running was sport, but the jumping was without comparison. One of the horses caught his feet and plunged over, rider and horse together, but, neither being hurt, everybody shouted with glee. Another of the Arabian steeds carried the hurdles off victorious with his hind feet, but did not fall. A foot-race by the Indians was then declared with as much gravity as though a Grecian contestant, after all the abstinence and training of an ancient athlete, proposed to try his strength and speed for a victor's crown. Three or four big Indians, dressed with fancy caps and moccasins, walked to the pedestrian race-grounds, after which one started to run, but fell. The crowd was too big for them, and the reward too small. Two of the natives took their places, and made very good time, but not quite equal to a professional walker. Then came the hand-barrow race, with that