In a special sense the ivories placed upon beds used to be so called, h)/lektra. Aristophanes [says]: "with the pegs falling out and the tone no longer there". Consistently, after the bed he also mentioned the 'tone'. A bed's 'tone [comes from] its cables, and metaphorically it means the tuning of the voice. For ancient beds used to have their feet set with dark precious stones and amber, just as now [they are decorated] with silver and tin. The parts of the couches which are held together are [sc. an image for] harmony. [Thus] he adhered to his metaphor.