The cc-by-sa note in the pdf is presumably because that is the copyright listed on Commons and Flickr. However, the original work appears to be in the public d

The cc-by-sa note in the pdf is presumably because that is the copyright listed on Commons and Flickr. However, the original work appears to be in the public domain. R & L Lambry were a father (Léon) and son (Robert) who died in 1940 and 1934, respectively. French copyright, as in all of the EU, lasts for the life of the author + 70 years. I found this fairly interesting bibliography of the Lambrys: http://nouvellesuzette.canalblog.com/archives/2010/05/13/17919647.html http://nouvellesuzette.canalblog.com/archives/2010/05/13/179... And confirmed with this information from the French national library: https://catalogue.bnf.fr/ark:/12148/cb32342632r https://catalogue.bnf.fr/ark:/12148/cb32342632r https://data.bnf.fr/10863941/leon_lambry/ https://data.bnf.fr/10863941/leon_lambry/ https://data.bnf.fr/16969919/robert_lambry/ https://data.bnf.fr/16969919/robert_lambry/