A PORTAGE TO DUTTON. — DESCENT OF THE ST. MARY'S RIVER. — FETE GIVEN BY THE CITIZENS TO THE PAPER CANOE. — THE PROPOSED CANAL ROUTE ACROSS FLORIDA. — A PORTAGE TO THE SUWANEE RIVER. — A NEGRO SPEAKS ON ELECTRICITY AND THE TELEGRAPH. — A FREEDMAN'S SERMON.THE RICH FOLIAGE OF THE RIVER. — COLUMBUS. — ROLINS' BLUFF. OLD TOWN HAMMOCK. — A HUNTER KILLED BY A PANTHER, DANGEROUS SERPENTS. — CLAY LANDING. THE MARSHES OP THE COAST, — BRADFORD'S ISLAND. — MY LAST CAMP. — THE VOYAGE ENDED.CHAPTER XV. DOWN UPON THE SUWANEE RIVER.