We have before us a volume of autograph letters, chiefly of soldiers and statesmen of the Revolution, and addressed to a good and brave man, General Palmer, who himself drew his sword in the cause. They are profitable reading in a quiet afternoon, and in a mood withdrawn from too intimate relation with the present time; so that we can glide backward some three quarters of a century, and surround ourselves with the ominous sublimity of circumstances that then frowned upon the writers. To give them their full effect, we should imagine that these letters have this moment been brought to town by the splashed and wayworn postrider, or perhaps by an orderly dragoon, who has ridden in a perilous hurry to deliver his despatches. They are magic scrolls, if read in the right spirit.