The Saginaw District, important and extensive as it is, comprises but a small portion of our hard-wood lumber region. In addition to numerous almost interminable forests in the north, equally accessible and almost equally valuable, there are extensive regions in the interior where timber abounds of such choice quality as to abundantly warrant railroad transportation hither. Although some of the shipments last season were of the far-famed Canada oak, shippers all concur in assuring us that the Michigan timber was held in as high estimation, if not higher, than any other offered in the foreign market. A most significant fact, coming right to the point, came under our observation a few months since. In the summer of 1858, five passenger cars for the Michigan Southern Road were built at Adrian, which unprejudiced judges pronounced the finest ever built in the United States. Every foot of timber in them--as well as every pound of iron--was of Michigan production. Last spring, after being in use some twenty months, these cars were for the first time overhauled for repairs, along with a number of eastern cars which had been in use for a like period of time, when it was found that the latter, owing to the inferior quality of timber, cost for repairs nearly as many dollars as the Michigan cars did cents! We have the authority of gentlemen of the highest respectability for stating this as a literal fact. The following is a complete list of the vessels which cleared for European ports the past year, together with the character of their cargoes, respectively, and the port to which they sailed:-- Bark D. C. Pierce, Staves, Liverpool. " Allies, Lumber and staves, Cork. " W. S. Pierson, Lumber and staves, Greenock. " Massillon, Lumber and staves, Liverpool. Brig J. G. Deshler, Staves, Glasgow. " Caroline, Lumber and staves, Liverpool. " Black Hawk, Staves, London. Schr R. H. Harmon, Staves, Liverpool. " J. F. Warner, Staves, Liverpool. " Gold Hunter, Staves, Cork. " Dousman, Staves, London. " Valeria, Lumber and staves, Liverpool. " Vanguard, Staves, Liverpool. " Grand Turk, Lumber, Hamburg. " St. Helena, Lumber and staves, Cork. " Chieftain, Lumber and staves, London. " C. H. Walker, Lumber and staves, Liverpool. " M. S. Scott, Lumber, Hamburg. " E. Bates, Lumber and staves, Liverpool. " H. Barclay, Staves, London. " Republican, Lumber and staves, Cadiz. " Messenger, Staves, &c. Calais.