What can you tell me about a pistol with these markings us haston co medd tn 1851 and us job p 1853 steel?

Most likey it reads H. Aston & Co. Henry Aston of Middletown, CT, made pistols from 1846 to 1850; 6000 were made in 1851 and 1852 marked "H. Aston & Co". Go to this site http://www.johnnyg.westhost.com/civilwar-guns.html and page down to the bottom for an example.