The machinery by which the government has so far exercised its protection of the negro and of free labor in the south--the Freedmen's Bureau--is very unpopular in that part of the country, as every institution placed there as a barrier to reactionary aspirations would be. That abuses were committed with the management of freedmen's affairs; that some of the officers of the bureau were men of more enthusiasm than discretion, and in many cases went beyond their authority: all this is certainly true. But, while the southern people are always ready to expatiate upon the shortcomings of the Freedmen's Bureau, they are not so ready to recognize the services it has rendered. I feel warranted in saying that not half of the labor that has been done in the south this year, or will be done there next year, would have been or would be done but for the exertions of the Freedmen's Bureau. The confusion and disorder of the transition period would have been infinitely greater had not an agency interfered which possessed the confidence of the emancipated slaves; which could disabuse them of any extravagant notions and expectations and be trusted; which could administer to them good advice and be voluntarily obeyed. No other agency, except one placed there by the national government, could have wielded that moral power whose interposition was so necessary to prevent southern society from falling at once into the chaos of a general collision between its different elements. That the success achieved by the Freedmen's Bureau is as yet very incomplete cannot be disputed. A more perfect organization and a more carefully selected personnel may be desirable; but it is doubtful whether a more suitable machinery can be devised to secure to free labor in the south that protection against disturbing influences which the nature of the situation still imperatively demands. IMMIGRATION.