A spectacular blaze, the cause of which is not definitely determined, destroyed the freight she and outer end of the Oak Bluffs steamboat wharf late Wednesday afternoon, involving a loss of property owned by Vincent’s Fish Market, on the dock property, the value of which was set at $30,000 and a loss to the Steamship Authority, covered by insurance, not yet even approximated. The fish market equipment was uninsured, according to David Vincent, the proprietor.