Letter from the Post-Master General accompanying a report relative to post-roads within the United States, which have not produced one third part of the expense of carrying the mail upon the said roads during the last year, 4th February, 1805, read, and ordered to be referred to the committee appointed on the 6th November last, "to enquire whether any and what amendments are necessary to be made in the acts establishing a post-office and post-roads within the United States"