from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
INTRODUCTION. That part of a writing in which are detailed those facts which
elucidate the subject. In chancery pleading, the introduction is that part
of a bill which contains the names and description of the persons exhibiting
the bill. In this part of the bill are also given the places of abode,
title, or office, or business, and the character in which they sue, if it is
in autre droit, and such other description as is required to show the
jurisdiction of the court. 4 Bouv. Inst. n. 4156.