Arrivals and settlements dated only to 1855: James Clark came to Canada from Scotland ; Judge Conger came to Janesville ; a lawyer came to Janesville joining Noggle, Williams & Patterson ; Crosby came to Beloit (Newark? — he came to Wisconsin in 1855) ; Keeler came to Wisconsin locating at Beloit ; a carpenter bought fifty acres in Rock Township ; a tailor settled in Beloit and went into business ; Rosenblatt came to Beloit ; a young man came West about 1855 and learned blacksmithing in Beloit ; Cobb came to Clinton and began manufacturing wagons ; Crandall went to Madison and engaged in buying stock and grain ; a home built in Lima about 1855 ; Freeborn located on his farm ; Fritts removed to Rock Co. and owned the Lima store ; a family removed to Wisconsin settling at La Prairie (240 acres) ; a settler located at La Prairie (ninety acres) ; a settler located at Avon ; Fairfield moved to Bradford and purchased 296 acres ; a Fifeshire man purchased a farm on Rock Prairie ; Cooke and son came to Wisconsin ; Magnolia settler returned from California ; a farm rented from J. Montgomery ; a house in Janesville traded for eighty acres in Magnolia Township ; a settler settled in Porter Township ; a broom-maker came to Janesville ; a lime merchant came to Janesville as a teamster ; Wallace came to Footville and went into the mercantile business ; a man came to Rock Co. about 1855 ; a family settled at Turtleville ; a family settled on the present Beloit-area farm ; a family moved from New York and settled in Dunkirk, Dane county ; Finch family came from England ; Grunhuvd family settled in Plymouth township ; a watchmaker went to Fort Wayne, Ind. ; a blacksmith settled on a farm in Rutland township, Dane county ; a man removed to Orleans county, N. Y., and married ; a man came to Beloit and was employed in the lumber yards ; John Murray came to Janesville ; John P. Watson became a resident of Janesville ; a settler came to Johnstown, locating on Sec. 19 ; a man came to Beloit in 1855 and attended school ; Banks returned for Mrs. Banks ; many laborers came to Beloit, including Patrick Mooney and wife, John Leary and wife, and William Condon ; a man came to Wisconsin locating at La Prairie ; the Hardware firm Lawrence, Strong & Co. dissolved ; Magnus Hanson commenced business for himself ; William S. Morgan began learning carpenter trade at Janesville ; a man entered the employ of a lumber firm ; H. Dickinson settled in Edgerton ; Soverhill settled on his present homestead ; settlers came to Footville ; a man came to Wisconsin in 1855 ; a family settled at Footville ; a homestead built in Magnolia ; a homestead built in Magnolia Township .

Rock CountyGrade A · 1 independent source

The evidence

“COXGER, Judge of the Twelfth Judicial Circuit; was born in Cortland Co., N. Y., where he read and practiced law until he came to Janesville, in 1855. While a resident of Cortland Co., he took a lively interest in political afiairs, and, while pursuing his legal studies, he purchased the Cortla,nd County Whig, which he edited with ability and earnestness for six years ; at the expiration of this period, the young editor sold it out and gave his entire time and energies to his profession ; shortly after his admission to the bar, much to his surprise, he was nominated to Congress by the Whig Convention in 1846 ; owing to the political complexion of the district, many believed -that the nomination was only an empty honor, but, contrary to general expectation, Mr.”
1879-history-of-rock-county/17-bios-janesville.md, PDF p. 698 / book p. 702
Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.
Grade A: Found on a page of one of our sources