William B. [Strong] was given the Janesville railroad office temporarily.

The evidence

• “Broadhead was president of the Milwaukee & Mississippi railway, James Strong, its agent and telegraph operator at Beloit, had his younger brother, William, assist in the work, and so started him in the railroad business at the age of fifteen. The two brothers worked together until 1855, when William B. was given the Janesville office temporarily, during the vacation of its regular operator, George Cheney. The unexpected death of Mr.”

  1908-brown-rock-county/06-history-of-beloit.md, Vol. 1, PDF p. 212 / book p. 193

  Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.

  Grade A: Found on a page of one of our sources