Documents
Sebastien Erard, 1794
Sebastien Erard, 1801
Becker, 1802
Sebastien Erard, 1802
Groll, 1807
Sebastien Erard, 1808
Sebastien Erard, 1808
Sebastien Erard, 1810
Groll/Dizi, 1813
Erat, 1813
Dizi, 1817
Willis, 1819
Delveau, 1822
Pierre Erard, 1835
Corbett, 1836
Pape, 1845
British harp patent drawings (1795-1845)
Selections of diaries and papers from the J. Geo. Morley harp business (1891-1944), The Dust Collection
Mike Baldwin : Organologist : Historian : Researcher : Writer : Harp maker : Restorer