Newhall porcelain reference books, to include: Preller 'A partial reconstruction of the New Hall Pattern Book', Godden 'New Hall porcelains talk supplement' , Hutton 'Guide to Newhall Porcelain Patterns', Holgate 'New Hall' also 'New Hall and its Imitators' together with Barratt 'A&E Keeling', Berthoud 'Patterns on Machin Porcelain', Thom and Miller 'Machin' and Harvey 'Rathbone' (9)