Double-action harp

The restoration of a mid-19th century Érard double-action harp, by Zsolt Hidasi

The following conservation and restoration report by Zsolt Hidasi details his excellent work on a mid-19th century London-made Erard...

Originality and Influence: Charles Gröll’s Role in the Invention of the Double-action Harp

The linked article is an expanded version of the paper Robert Adelson read at the conference “The Early Pedal Harp as a Museum Artefact,”...

Erat Harp Sales (1821-1824)

The linked document (click on the image) is a transcription of the Erat Company's harp sales (21 February 1821 - 29 June 1824), taken...