Add the date of the manuscript

Warning²Federal courts, Illinois courts21st and 22nd editions

An unpublished manuscript carries its date in parentheses, ahead of the parenthetical saying the work is unpublished; the date is the one the manuscript itself bears.¹

1. 1R. 17.2.1 Manuscripts. Tables: R. 17.2 Unpublished Materials.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.