A photograph said to be of the iceberg that sank the Titanic is to go under the hammer.
The picture was taken by the chief steward of a liner that passed the iceberg the day after the disaster, which claimed the lives of around 1,500 people.
He was still unaware of the sinking but describes seeing scrapings of red paint on the side of the iceberg.
The photograph will be sold by Henry Aldridge & Son alongside a previously unpublished document written by the chief steward of the Prinz Adalbert.
"On the day after the sinking of the Titanic, the steamer Prinz Adalbert passes the iceberg shown in this photograph," it reads.
"The Titanic disaster was not yet known by us. On one side red paint was plainly visible, which has the appearance of having been made by the scraping of a vessel on the iceberg.
"SS Prinz Adalbert Hamburg America Line."
The document is signed by the chief steward and three other crewmen.
The Titanic sank on April 14, 1912 during its maiden voyage to New York from Southampton.
Auctioneer Andrew Aldridge said: "The photograph was acquired not long after the Titanic's sinking by Burlingham, Montgomery & Beecher, attorneys for Titanic's owners, White Star Line.
"This photograph, regarded by generations of Burlingham maritime lawyers as 'The Titanic Iceberg' hung on the firm's walls from 1913 until it closed in 2002.
"It is now being offered for sale on behalf of the four attorneys who were still partners of the firm at the time of its demise."
It will be auctioned in Devizes, Wiltshire on October 24, with an estimate of £10,000-£15,000.