A lost ichthyosaur from the Lower Lias of Somerset in the collection of the Rev. David Williams F.G.S. (1792-1850), and figured in William Buckland’s Bridgewater Treatise of 1836

I am seeking a lost ichthyosaur, and any plaster casts of it, from the collection of Reverend David Williams F.G.S. (1792-1850) of Bleadon, Somerset (general details of collection in Taylor 2016)