25th President: William McKinley, 1897

Nail = 25 (McKinley was the 25th president)

Mac kindly (lent to her) = McKinley

Heavy bag = 897 = 1897 became president

William Shakespeare = William 

As she left the nail (25) bar, the mac kindly (McKinley) lent to her meant she didn't get wet as she carried her heavy bag (897) home.

Connect McKinley to William

The mac kindly (McKinley) lent to her belonged to William Shakespeare. She gave it back to him on stage.

NOTE: The way Mammoth Memory remembers William is to think of William Shakespeare.