prehistoric creatures was growing. It was later sold for £45 and five shillings at auction in May 1819 as a "Crocodile in a Fossil State" to Charles Konig, of the British Museum, who had already suggested the name Ichthyosaurus for it. Anning's mother Molly initially ran the fossil business after her husband Richard's death, but it is unclear how much actual fossil collecting Molly did herself. As late as 1821, Molly wrote to the British Museum to request payment for a specimen. Her son Joseph's time was increasingly taken up by his apprenticeship to an upholsterer, but he remained active in the fossil business until at least 1825. By that time, Mary Anning had assumed the leading role in the family specimen business. Birch auction The family's keenest customer was Lieutenant-Colonel Thomas James Birch, later Bosvile, a wealthy collector from Lincolnshire, who bought several specimens from them. In 1820 Birch became disturbed by the family's poverty. Having made no major discoveries for a year, they were at the point of having to sell their furniture to pay the rent. So he decided to auction on their behalf the fossils he had purchased from them. He wrote to the palaeontologist Gideon Mantell on 5 March that year to say that the sale was "for the benefit of the poor woman and her son and daughter at Lyme, who have in truth found almost all the fine things which have been submitted to scientific investigation ... I may never again possess what I am about to part with, yet in doing it I shall have the satisfaction of knowing that the money will be well applied." The auction was held at Bullocks in London on 15 May 1820, and raised £400 (the equivalent of £ in ). How much of that was given to the Annings is not known, but it seems to have placed the family on a steadier financial footing, and with buyers arriving from Paris and Vienna, the three-day event raised the family's profile within the geological community. Fossil shop and growing expertise in a risky occupation Anning continued to support herself selling fossils. Her primary stock in trade consisted of invertebrate fossils such as ammonite and belemnite shells, which were common in the area and sold for a few shillings. Vertebrate fossils, such as ichthyosaur skeletons, sold for more, but were much rarer. Collecting them was dangerous winter