'The happy years': an expression that is particularly apt for J. S. Bach's period in C�then. Freed from the obligations that held him back in Weimar and not yet caught up in the Leipzig treadmill, Prince Leopold's prot�g� produced masterpieces of such flamboyance that Benjamin Alard could not resist the pleasure of inviting some of his dear musician friends to join him around the splendid three-manual harpsichord by Hass.