The ships on the lakes, especially those on Ontario, with the exception of the New Orleans and Chippewa, of 106 guns each, are in a state of rapid decay, as was to have been expected. Those named were not launched, and, being well covered, might now soon be fitted for service. But, even in the event of a war with Great Britain, of which there is no present prospect, it is doubtful whether any great naval force will be maintained on the lakes. The circumstances of the countries bordering on them are materially changed - what was a wilderness (on our side of them) at the beginning of the late war, now teems with inhabitants, hourly increasing in numbers, and advancing in power; abounding also in supplies of all sorts necessary on an emergency. No one ever entertained the idea, we should suppose, that the great naval establishment on the lakes would have been kept up - the ships were built for temporary purposes, and it will be much cheaper to build others, if they should even be wanted, than to keep in repair ships built as these were, during peace. Several of them, we know, were, on the lake, fitted for service, in less than 60 days after the trees of which they were built were felled in the forest. They were perishable in their nature, and have perished.