Helvetia

Hi there! I'm new to this so I hope I'm in the right place. I'm looking for information on the above ship which sailed from Le Havre to New York in early 1851 under a Captain March/Marsh. From information on this site, I believe it to have been the schooner of that name, built in 1840 and owned by Fried, Otto & Son. I would like to find out more about this ship. I am transcribing the memoirs of one of the emigrants who was on board, a Frenchman by the name of Jean Baptiste Arthaud. Does anyone know if a picture exists of this ship? Where to find it? Failing that, a picture of the type of ship would be a help. I've seen different sorts of schooner and have no idea which it resembles! Can anyone help? tgar