bind each case with a rubber band,
that means, you have one 140 case, 1 to several 485 cases depending on how many dependents you have.
A document list for each case should be included in your cover letter already. If you have a lot of evidence in a particular category, you may put an additional list for that category in order for officer to easily identify them when they enter the data into USCIS machine.
Good luck.