The petitioners also filed an annexure to the petition containing the signaturesof 146 other members, stating their consent to file the petition.
annexment in British English
(ˈænɛksmənt) or annexure (ˈænɛksjʊə)
noun
a thing that is adjoined or added on
To whose huge spokes ten thousand lesser things are mortised and adjoined, which,when it falls, Each small annexment, petty consequence, attends the boisterous ruin