In this letter to Miss Marx (possibly the publisher Erica), Beckett apologizes for the delay in contact. He explains that he was busy with the negotiations with Faber & Faber for the English-language edition of Godot.
Beckett, Samuel, “Samuel Beckett to Miss Marx, 15 October 1955,” WUSTL Digital Gateway Image Collections & Exhibitions, accessed March 28, 2024, http://omeka.wustl.edu/omeka/items/show/14964.