James S. Baillie was active as a lithographer in New York City from the 1840s up until 1855.  Baillie was the primary competitor, along with the Kellogg brothers business, to Currier and Ives in the business of producing and selling genre and historical lithographs.  His place of business in 1848 was at the address listed on this print (87th St. near 3rd Avenue N. York", so I am dating this print to that year, although there is no date on the lithograph itself).

The subject of the print is the very popular and famous early 19th century poet, adventurer and libertine, Lord Byron.  He is sitting with a young lady, Marianna (who appears intent on distracting him from his writing), about whom he wrote in a letter in 1816:

I have fallen in love, which, next to falling into the canal (which would be of no use, as I can swim), is the best or the worst thing I could do. I have got some extremely good apartments in the house of a ‘Merchant of Venice’, who is a good deal occupied with business, and has a wife in her twenty-second year. Marianna (that is her name) is in her appearance altogether like an antelope. 

This print is from my personal collection which I am beginning to sell off.  Unless noted otherwise in the description, the prints, art and other items that I sell are not "reproductions".  Please check my other listings for additional items of interest.  I will combine shipping.