As you say, Alas neither of these gentlemen are alive.
Hugard ( 1872 to 1959), and his collaborator Frederick Braue ( no details available) must rank as the most prolific writers on the subject of magic from the last 100 years or so.
Jean also wrote many books as a solo project, and with other authors, but it appears that although each and every one of these publications are worth their weight in gold, the works penned with Braue are by far the more successful.
thir classic texts royal road to card magic, and expert card technique, being sited around the world as the seminal work on card magic.
However as can be seen below, Hugard also performed , and indeed had some success at the time with an act emulating that of Chung Ling Soo...
Dale
http://www.magicgallery.com/images/Hugapanel.jpg