He signed them Henri Rousseau.
Robert Henri completed a lot of paintings in a lot of places. Yet, he was best known for his skill as an art teacher. In his will, he wanted all of his unsold paintings sold. and was collecting great...
Except for special exhibitions (and then rarely) the Louvre does not have 20th century art.
Henri Rousseau made 350 paintings.
He didlots of paintings but he became ill and turned partially blind so he changed to an art called scissor painting. (or cut-outs)