Stampless letter to S.H. Lathrop, Oswego, NY. - 18¾ cent manuscript rate mark

In 1845, S. H. Lathrop (Stephen H. Lathrop) was a prominent figure in Oswego, New York, specifically known for his involvement in the city's banking and business development. This sender is asking Lathrop to lobby for a trade deal coming into the House and to lobby against a proposal regarding discrimination issue. Fascinating correspondence from an obviously well-educated writer.