...retary's room this morning, I found him as grave as usual. L. Q. Washington, son of Peter Washington, once a clerk under President Tyler (and he still remains in the United States), and grandson of Lund Washington , who, we learn by one of the published letters of Gen. Washington, was his overseer, with no traceable relationship to his family, was seated with him. He is chief clerk to Mr. Benjamin, a sinecure p...