Peter Vivian Daniel, McMicken v. Webb (47 U.S. 292)…
“ This is, according to the peculiar proceedings in the State of Louisiana, an action at law, although, from the mode of proceeding by petition, from the introduction into that petition of various matters dehors the instrument set out as the immediate cause of action, and from the converting in one proceeding parties standing sui juris with those who sustain a representative character, it bears a striking resemblance to a suit in equity. ”
