I found a copy of Volume I of the testimony that I was allowed to borrow. The book is still in fairly good condition, although the paint (?) on the spine comes off on my hand if I hold it there. I tried to touch it as little as possible.
I've uploaded a few pictures of the book, just to give you a general sense of the book and the testimony inside of it.
FYI: Mr. Tayler is the attorney for the protestants. Mr. Worthington and Mr. Van Cott are the attorneys for the respondent (Reed Smoot). The other Senators mentioned on this page are members of the committee.
The full name of the book on the spine is as follows:
SENATE DOCUMENTS Vol. 24
PROCEEDINGS in matter of protests against REED SMOOT Senator from Utah Vol. 1
59th CONGRESS 1st SESSION 1905 1906
Don't forget, there are 4 Volumes for this hearing, this is just the first one.