ACCOUNT 



OP 



AN EXPEDITION 



FROM 



PITTSBURGH TO THE ROCKY MOUNTAINS 



PERFORMED IN THE YEARS 1819—50. 



BY ORDER OF THE 



HONOURABLE JOHN C CALHOUN 



14/, £ 



SECRETARY OF WAR. 



1 



MAPS and PLATES. 



t/ 



tf/My\rf)fosTi D 



FIJI LAD ELTHM: 



H. C. CAREY AND I. LEA, CHESNUT STREET. 



1822. 



