Stampless letter  re ship cargo/ship business-appears to be ship captain reporting to home port or other. 

United states Post office contract Packet Steamship Southampton to New York 

Via Havre Line 'SS Arago' which sailed for New York from Southampton on Oct 24 1855  

Privately forwarded from Cadiz to London outside the post:  Joseph Bensusan Cadiz to JCR THURN  & Co London. 

Originating Postmark:   LS OC 22 1855     Lombard street  +  TOO LATE  GPO (for that day's mails)

Transit postmark:  None

Originating rate:  12 pence sterling / 24cents USA currency . Single weight rate USPS PO contract Packet rate to USA.  3 cents for UK inland + 16 cents  transatlantic + 5 cents for USA  inland  

British post office accounting mark fee charged to USPS  3 CENTS  applied at London PO 

Ocean Voyage:   New York & Havre steam Navigation co  'Arago' sailed from Southampton on OC 24 for New York where it arrived on Nov 6 1855.  

USA destination postmarks:    24   New York 24 handstamp

 This is the amount due, 24 cents from the addressee in  New York.

CONDITION NOTES:  Filing folds.     See ebay images both sides and unfolded.  

 The condition of the letter should show clearly in the images. Please contact the seller if you have any question about the item's condition or description!