TIiü Canadiuu papera iro diseusing the subject of a decreast; oí populalion. A writer iu tho Toronto Leader Bays: " Whilst we ure spealiing of defense, militia, &c, &c, our industrions and indispensable classes of mechanica, workman, laboren, eic, are, with Uieir families, leaving daily by the hundred from our land to obtain a subsistenee in a neighboring country sfflicted by a civil war. Qur population, ulready inatlequate lo tlii.t immentie torritory, is every day deeruaein immuasurably. 'J'ho forestM, tlie wilderness, wliich not long since were so rapidly changing into beautiful Heldf, dread less tho persevering hand of iiiüii Newtownsare no longer seen to spring up. Cupital, brought ifltu tho country tormeily by thu uxertiona of ome of our gruat men who were oftun ungralefully calumnia ted, no longer cootributew to itio enlargrneut or emU.-]lisuinont of our cilios, nor to the ereotion of the pubüj eiüfices, but hijilon, as it ware, is unprotitablo to the pnblici welfare, iiven lureign immigration, the true weallli oí a new country, and which, to a certftin degree, was prcsptrouH and had found ils vvay to Canada, has ilso of late turued its tide to the Uuiled Staten But enougli of these calamitie.s."