Officially Delhez started with Les Fleurs Du Mal series in 1932 but we have a letter to his sisters Jeanne and Alice stating that the first works were already made in 1928. This five-part series based upon the work of the French poet Charles Baudelaire has a total count of 61 works. All engravings in this series are preceded by the letter B from Baudelaire and the original titles are all in French.

The five parts all have their own series title. In the subseries column you will see a certain code consisting of two letters and a number. The legend below gives you more information about what these letter codes want to say. The number after the letter code is the sequence number of that series.