The following letter, from Oen. George W. Morgau, of Ohio, gives the brightest possiblo promiae of Democratie union and of Democratie victory in the great contest now begon for Centoiinial reform : "AIobnt Veknon, O., Jnly 1, 187G. " HoK. JoHK G. Thompson : This is the extreme moment in our country' history. The firat thing to be done ia to drive from power the oppresuora and plunderers of the people. That done, all other quostions can be determinad. In the meanwhile all personal ambitioiis must give way to the public good. I regret that I cannot be with you in pernon, but I will bc Ifftb you in hoart, hope, and devotion for the cause of reform and the mainteuauce of individual and public liberty. Tilden and Hendrick can and must be elected. (Signed) "Geo. W. Mohoan."