I read the date of the second marriage as being 14 June 1899. It lists Treffle as "veuf majeure de feu Elisa Garceau", which translates as "full-aged [that is, over 21 or whatever the age of majority is] widower of the late Elisa Garceau"; so yes, Elise died before this second marriage, but no date of death is given for her. Alexine's parents have first names of Thomas and Virginie, but I cannot make out their last names either.