 "Sachem", meanwhile, was busy transporting the wounded to the hospital at Pilot Town, mapping the labyrinthine waterways in the vicinity, supplying pilots for military traffic on the river, and helping to refloat after that gunboat had run aground.Farragut, covered by an intense bombardment from Porter's schooners, had dashed through the obstructions across the river and past the forts on the night of 23–24 April.The outflanked riverine forts surrendered on the 28th.