Yesterday morning about 4000 of the enemy landed at Fogg's or Frog's [Throg] Point, in the sound, about 6 miles above us: a detachment was immediately sent to oppose them: The enemy got possession of the point, but as I was informed last night had made no farther progress. Our people, I am told, had taken up a bridge which was there, and felled trees across the road, to obstruct them till a reinforcement could arrive. In the afternoon 42 sail passed the mouth of Harlem river, in their way to the point; they consisted of sloops, schooners, brigs and 9 ships. I expect there will be bloody work there to-day. From the number of men landed and the ships which went up, I think this can be no feint, but that the main body of Howe's army must be there, and that there he intends to make his Coup-de-Main. This week will probably finish the campaign. ー Upon the arrival of the ships at Dobbs' ferry they landed some men and plundered a store-house. I suppose those men who landed yesterday are to go across that country, and form a line from Frog's point to Tarrytown, 4 miles above Dobb's ferry, where the ships lie, but in this I expect they will be mistaken.