The return for 1851 is not as full as for 1850; consequently there is an apparent decrease in detail, although there is a large increase in the gross exports. The "other articles and unenumerated" comprise omissions of enumerated articles, which (if known) would show an increase in articles, corresponding to the total increase, in almost every item of export.

THOS. C. KEEFER.

MONTREAL, May 1, 1852.