The SHERIDAN was an 895 ton square rigged ship which was part of the Dramatic Line built by Edward Knight Collins of America to compete with the English Clippers of that era (she was built in 1846 or thereabouts)
She was captained by George Bishop Cornish, a veteran mariner, on several voyages during the early 1850's and by 1856 her Captain was Samuel Clark.
Sailing time was not as long as 6 months as was suggested, she was a very fast ship and competed in a race to New York on her maiden voyage. I think some crossings were less that 30 days.
My ancestor Frank Umbers was a cabin boy on the Sheridan for a time and his uncle was George Bishop Cornish. I would be happy to share information about the Sheridan with anyone who is interested in her.