A Free Fight, Mr. John 8. McGuffin, late lieutenant of police under Mayor Fox, keeps a public house at Thir teenth and Wood streets Several colored men called there on Sunday, and at last got into an altercation with Mr. McGuffin, who insulted one of them. McGuffin was struck in the face by a col ored man, who then ran. He was followed by Mc Guffin,and a general fght took place, during which a brick was thrown at the extreate pant,striking him on the side of the head. Moses one of the colored men, was arrested, and held by erman Massen further hear sated that M declined to prose