Williamsburg History: 4 pages
History of Iowa County, and Its People
by James C. Dinwiddie. Chicago: The S.J. Clarke Publishing Company, 1915.

Judge H. D. Evans letter: Williamsburg beginning
Williamsburg: Williamsburg
Pioneer Recollections, by Harley Ransom. Hist. Pub. Co., Cedar Rapids, Iowa, 1941. 240pp. Illus.

Richard Williams' 1860 letter (image & transcript): Dear brother >>
translated by Gwawr Jones, June 2002

1850 Green Township Census (transcript): 1 page
District No 9 Green Township, Iowa Co, Iowa, 22 August 1850;

1851 Iowa State Census (images): enumerator's page, 1 page
"Iowa County, 7th day of July 1851"

1856 Iowa State Census (images): page 298-299
Troy Twp, Iowa County

1860 Troy Twp Census (image): page 585
"Troy Twp, Iowa County, 18th day of July 1860"

Williams IGI Lookup: Christenings: Richard Williams
Tudor IGI Lookup: Christenings: Tudor Family
Evans IGI Lookup: Christenings: Evans Family
LDS's International Genealogical Index

North Wales Map: 1898 Map

Johnson County History: Cover page, 2 pages
Hawkeye Heritage, Vol VII, No 3, July 1972
Iowa Genealogical Society, Original source: ?.

Unity Presbyterian Church History: Fifty Years of Church Life
The Iowa City Citizen, Iowa City, Johnson County, Iowa; Tuesday, 26 February, 1909

Map of Union Township: page 35
Atlas of Johnson County
by ?. Chicago: The ? Publishing Company, 1870?.

1850 Liberty Twp Census (images): Tudor (pg 265), Tudor, Williams (pg 266)
"District No. 9 Liberty Township ... Johnson County 26th day of August 1850"

1860 Union Twp Census Info: Tudor and Edward T. Williams Families

1870 Union Twp Census (low quality images): Tudor, Wms (pg 1), Tudor (pg 2), Phebe Wms (pg3)
"Union Township, Johnson County, 18th day of July 1870"

1860 - 1870 Sharon Township Census Info: Baxter's

Cambria County Township map: (external): Cambria Co GenWeb

1820 - 1860 Cambria County Census Info: Tudor's and Baxter's

Naturalizations, 1835, Cambria County, Pa (external): John Baxter