Show Keeping American Prisoners Bluellclds Geneml Hlvas of the Madrlz forces has refused the propo sltlon of General Mena to exrhnnse the American engineer William P Pitt man for Colonel Sa amanra Pitt man Is a prisoner at U Buelleldfi I Illurf while Saamanca was captured by the provisional in the attack on ivllri Lagoon Tho Madrlz steamer Venus with the San Jacinto made an attack Salur day on Yagon Point to retake the customs house at that place but WOK repulsed Several men on hoard time steamer were killed |