Here's !!! (a.k.a. Exclamation Point, Exclamation Point, Exclamation Point or Three Exclamation Points by George Hughes Hepworth, 1881).

"Flickered—gone" -- a precursor to T. S. Eliot's "Not with a bang but a whimper" (1925).  From Once a Week, 1878.

Here's a sheepish question from Agricultural Societies Newsletter, 1989.

Some other sheepish questions:

"Is this thing on?" —Bill Morris, Saltwater Cowboys, 2004

"Oh, should we?" —Managing the Generation Mix: From Collision to Collaboration, 2002

"What do you think about it all?" —Darby Hauck, The Death Cry, 1917

Joel Burget asked "Why hasn't anyone combined ellipsis / question mark to parallel the interrobang?"  Such a mark actually goes a long way back.  Here's an example from Pearson's magazine, 1909.

From A Survey by Max Beerbohm, 1921.

I dreamed of a mysterious letter.

From The Nation, 1960.

"That which is yet to come cannot be foretold," from Springfield High School's Resume yearbook, 1909.  See How to Hoodoo Hack a Yearbook.

I dreamed my journal was exceprt'd [sic] in a book by Jennifer DeVere Brody: Punctuation: Art, Politics, and Play, 2008.  It was really a dream within a dream, as my journal was on a screen within a printed page.  And two typos mysteriously appeared in my text (a misspelled word, a missing comma), making it all feel so uncanny.

I dreamed of Wodehousian inquisitive eyebrows.

From The Hole Book by Peter Newell, 1908.