...just wanted to let you know that I ran the names you listed in The Oklahoman Newspaper archives & there were 2 small articles you may be interested in:

05-06-1911
p.12

LEGALS
The following named persons are hereby designated
and appointed to conduct said election at said
respective voting places:

THIRD WARD

Precinct No.4 Judges H.M. DuBoise and
G.C. Shotwell. Clerks, Frank Ziegler
and J.W. Adamson.

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05-08-1911
p.6

LEGALS
The following named persons are hereby designated
and appointed to conduct said election at said
respective voting places:

THIRD WARD
Precinct No.4 819 West Chickasaw Street (OKC)

Precinct No.4 Judges H.M. DuBoise and
G.C. Shotwell. Clerks, Frank Ziegler
and J.W. Adamson.

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...not for sure whether this is your ancestor or
but the name is not a common name.