Carter, Nicholas. <br/><br/>
The great enigma;  or, Nick Carter's triple puzzle. 
By Nick Carter [pseud.] ... 
 - New York,  Street & Smith  [1892] 
 - 189 p.  20 cm. 
 - Secret service series,  no. 61 .
<br/><br/><label>LCCN: </label>ca 07002602  
<br/><br/><label>LC Class. No.: </label>PS1449.C378  / G7 
<br/><br/><label>Dewey Class. No.: </label>813/.4