Pegram’s force* art from 4,000 to 4,000. Breckinridge is aiill to oome with about 1,600. 8ooute and deteotivea hare boon busy of late, and thoro 1* no fear that we will again bo oanght napping. The rebels evidently underestimate the strength of the Army of Kentueky, rand it is to be hoped, with all their means of information, will proeeed with their plans. I oould fill easily, a oolumn with rumors. Notwithstanding the plot is thickening and penie is spreading as I predicted, an inoreasing tone of confidence is visible among the people in the ability of the army to pro* teot them this time. How muoh is due to the suddenly aroused yigor and vigilance of Gilmore; the oonfidenoe felt in Carter,who is in the front; or the chenge in the administration of the department, I cannot determine, but it is so. Plane are be* ing rapidly perfected, and a vigorous movement is near.