Amsterdam,
the other hamlet of Liberty Township, is situated in the western part. A
blacksmith shop was opened by Charles Wingard
in 1874, and several houses cluster about it. The population has never,
owing to the difficulty attending the taking of a correct and accurate
census, been computed, but it is variously estimated at from ten to
twenty-five.
History of Mercer County, 1888, page 558
At
Amsterdam or "Yellow Horse," in the west part of [Liberty]
township, a blacksmith and wagon-shop was opened by Charles
Wingard, about 1874, and is still [1877] owned by him.
History
of Mercer County, 1877, page 56
Landowners
and Businesses in and near Amsterdam, according to the 1873
Combined Atlas for Mercer County: J. Uber, M. R.
Uber, G. Uber, D. Uber, J. Sweitzer, Mrs. Scot, F. Chopin, Mrs. Dr. A.
Apley, J. Nelson, C. Pearson, A. Uber, German Reformed Church,
School House No. 3, old store, saw mill and blacksmith.
The
pioneer sawmill of the Uber family [was] in
the western part of the [Liberty] township. The Uber
mills along the Butler turnpike were the foundation of a small hamlet, and
the presence of a German Lutheran church, dating from about 1816, and the
nationality of many of the residents caused the name Amsterdam to be
applied to this locality.
Twentieth
Century History of Mercer County,
1909, page 161
Map
and driving directions to Amsterdam
If
you're looking for your ancestors in Amsterdam, try the Census
for 
