a NOTICE TO MARINERS. ments along the borders of our upper lakes. It is, indeed, a matter of surprise that so many valuable improvements in the harbors and docks of this section of the great lakes could be so thoroughly and successfully accomplished in a time so short. In no section of our country has the energy and enterprise of our people so manifested itself as in the improv- ing of the harbors and rivers of the Northwest. THOS. 8. THOMPSON.