Even in the winter of 1940, it was difficult to buy or rent a piano; not that the Germans were responsible (their pillage was directed to more useful ends) but because music had become all at once a very real need: for many young Frenchmen J.S. Bach was a powerful and safe ally in the Resistance against Hitler.
H.I. Marrou; Earl F. Langwell, The Review of Politics, Vol. 8, No. 1. (Jan., 1946)