Since a raid made by Colonel Montgomery up the Combahee, two months before, the vigilance of the Rebels had increased. But we had information that upon the South Edisto or Pon-Pon River the rice plantations were still being actively worked by a large number of negroes, in reliance on obstructions placed at the mouth of that narrow stream, where it joins the main river, some twenty miles from the coast. This point was known to be further protected by a battery of unknown strength, at Wiltown Bluff, a commanding and defensible situation. The obstructions consisted of a row of strong wooden piles across the river; but we convinced ourselves that these must now be much decayed, and that Captain Trowbridge, an excellent engineer officer, could remove them by the proper apparatus. Our proposition was to man the "John Adams," an armed ferry-boat, which had before done us much service,--and which has now reverted to the pursuits of peace, it is said, on the East Boston line,--to ascend in this to Wiltown Bluff, silence the battery, and clear a passage through the obstructions. Leaving the "John Adams" to protect this point, we could then ascend the smaller stream with two light-draft boats, and perhaps burn the bridge, which was ten miles higher, before the enemy could bring sufficient force to make our position at Wiltown Bluff untenable. The expedition was organized essentially upon this plan. The smaller boats were the "Enoch Dean,"--a river steamboat, which carried a ten-pound Parrott gun, and a small howitzer,--and a little mosquito of a tug, the "Governor Milton," upon which, with the greatest difficulty, we found room for two twelve-pound Armstrong guns, with their gunners, forming a section of the First Connecticut Battery, under Lieutenant Clinton, aided by a squad from my own regiment, under Captain James. The "John Adams" carried, if I remember rightly, two Parrott guns (of twenty and ten pounds caliber) and a howitzer or two. The whole force of men did not exceed two hundred and fifty.