SECESSIONIST CLEB«T Ilf BALTIMORE.A Baltimore correspondent of The New York Tribune saya :Bishop Whittingham was outwitted yesterday in Mount Calvary and St. Paul’s Churches. They are the chief seats of se-cessioiiism and rebellion, and to avoid the offense to their, ears polite, which the Bishop's recent prayer would afford, if uttered in their hearing, it was given .out that the Bishop’s service would he held at eleven o’clock, and Divipe service at twelve meridian. Of c our bo, none of the faitbfol went to the Bishop's service, and the prayer was read to empty benches. At twelve Mount' Calvary bell rang forth most violently the boor for Divine service, and the pro-slavery and rebellious Christians^ poured into their cushioned seats, oveijoyed at their escape from being obliged to thankGod for Federal victories.In Grace Church Dr. Cox took the bull by the horns, and announced that he should comply with the Bishop's order, telling the congregation that those who did not choose to. participate in the service wore at liberty to retire, when instantly there was such a rustling of crinoline duor-ward fhat.it seemed’ like the rushing of a young gale. More than half the assemblyvacated their; seats. Dr* Cox has never failed to meet the iaine boldly, when presented, always taking the side of the ; government He it „w« who refused to administer-ihe samment once last winter, telling hir: congregation that their frame of mind was such as to,forbid the celebration. 7 •