Two attempts to ascend Chimborazo /
Humboldt, Wilhelm,Freiherr von,1767-1835.
London, 
1838.
Pp. 89-92 of no. 878, pp. 134-136 of no. 881, pp. 163-165 of no. 883 and pp. 181-184 of no. 884 of The Mirror.