...cause Governor Cannon, in his proclamation, instanced among the causes for thankfulness the "freeing of the slaves of Maryland and the prospects of a speedy declaration of universal freedom." Mrs. Joshua R. Giddings died at Jefferson, Ashtabula county, Ohio, on the 15th instant. A St. Louis paper says: "There are not less than 200,000 persons in Missouri this day who are little better than paupers, not kno...