` ` We do n't know what secrets are supposed to be held on the ship , '' says explorer . ' Clifford says the ship is in the right place and is the right size . what has been written , '' Clifford said . A cannon of 15th century design found at the site is the ` ` smoking cannon , '' he says . Evidence is ` ` very compelling , '' says an archaeological expert .
` ` We do n't know what secrets are supposed to be held on the ship , '' says explorer . ' Clifford says the ship is in the right place and is the right size . A cannon of 15th century design found at the site is the ` ` smoking cannon , '' he says . Evidence is ` ` very compelling , '' says an archaeological expert .