"American lawman and gunfighter" . "1851Z"^^ . . . . "1885Z"^^ . . "Mysterious Dave Mather"@en . "1870Z"^^ . "1887Z"^^ . . . "David Allen Mather, known as \"Mysterious Dave\" Mather, was an American lawman and gunfighter in the American Old West. His taciturn personality may have been what earned him the sobriquet \"Mysterious Dave.\" Historical records show that he was a lawman in Dodge City, Kansas, and Las Vegas, New Mexico"@en . "Mather, David Allen"@en . . "1851-08-10Z"^^ .