Christie’s auction house has put up more than 50 letters from Montreal poet and musician Leonard Cohen to his girlfriend and muse Marianne Ihlen.

The online auction, which ends on Thursday, features letters dating from 1960 to 1979 – and one postcard written in the 2000s.

“These important letters shine a light on Leonard Cohen’s love, his life and work — through his own poetic words,” Christie’s writes in the description of the sale.