Lyon was elected Speaker of the Assembly by the Republican majority on the first day of the session, January 12, 1859. He would go on to be re-elected to the Assembly for 1860, and was again elected Speaker for that session. He did not run for re-election in 1860.[3]
The 8th Wisconsin was ordered to Missouri, in the Western Theater of the war, and attached to General Ulysses S. Grant's Army of the Tennessee. They participated in skirmishes along the Mississippi River to secure passage for Union forces south into Mississippi and Louisiana.[5]
In early 1865, while still serving with the 13th Wisconsin, Colonel Lyon was informed that he had been nominated for election to the Wisconsin Circuit Court. He won the election in April 1865 and began his service as Judge for the 1st Circuit in January 1866.[2][3][4]
In January 1871, Wisconsin Supreme Court Justice Byron Paine died unexpectedly. Governor Lucius Fairchild appointed Judge Lyon to fill the vacancy, and, the following April, his appointment was confirmed in a special election. Justice Lyon was re-elected in 1877 and 1883. After the retirement of Chief Justice Orasmus Cole at the end of his 6th term, in 1892, Justice Lyon, as the next most senior Justice, became the chief justice of the Wisconsin Supreme Court.[2] Justice Lyon had already announced his intention to retire at the end of his term, however, so only served two years as chief justice.
Granger case
Following the 1873 elections, the state enacted the so-called "Potter Law"—named for Wisconsin state senator Robert L. D. Potter—officially, 1874 Wisconsin Act 273. The new law was a major priority of the Granger movement and effectively put railroad and freight prices under the control of a new state Railroad Commission. The railroads immediately challenged the law. In the 1874 case of Attorney General v. Chicago & Northwestern Railroad Company, Justice Lyon wrote with the majority that sustained the legislature's power over corporations operating within the state. For the Grangers, however, the victory was short-lived. In the 1875 election, they were defeated and the 1876 legislature stripped the Railroad Commission of much of its regulatory power.
It had been a common practice in Edgerton, Wisconsin, for teachers in the public school to read passages from the King James Bible. In 1886, Roman Catholic parents complained to the school board about this practice, which they saw as teaching a sectarian and inaccurate version of the bible. The school board did not act on their complaint, so, in 1888, the parents sued in the Wisconsin Circuit Court. Judge John R. Bennett of the 12th Circuit ruled against the Catholic parents, so they appealed to the Supreme Court.
In the 1890 case of State ex rel. Weiss and others vs. District Board, etc., later referred to as the "Edgerton Bible Case", Justice Lyon wrote the unanimous opinion of the court that overturned the 12th Circuit opinion and ruled that the Edgerton public school practice was sectarian instruction and, therefore, violated Article X, Section 3 of the Wisconsin Constitution, which explicitly prohibits sectarian instruction in state public schools.
In 1889, 14-year-old Andrew Vosburg was kicked in the shin by 11-year-old George Putney. Putney was unaware that Vosburg had a previous knee injury, and the kick exacerbated the issue, resulting in severe infection. Vosburg became ill with vomiting and swelling of his leg with pus. He required two surgeries to drain the pus and remove degenerated bone tissue, leaving him with life-long weakness in his leg.
Vosburg and his family filed suit against Putney, alleging assault and battery. The 13th Circuit Court found in favor of the plaintiff and awarded $2,800 in damages. This decision was overturned by a ruling of the Wisconsin Supreme Court due to errors by the lower court Judge, A. Scott Sloan. The case was re-tried at the Circuit Court, and again found in favor of the plaintiff, this time awarded damages of $2,500 (approximately $71,000 adjusted for inflation to 2019).
The defendant again appealed to the Wisconsin Supreme Court. Justice Lyon wrote the opinion, which became a significant precedent for torts cases in the United States. The key findings were that:
Since the intended act was considered unlawful, the intention must also be considered unlawful.
Material omissions of fact in questions to an expert witness render the witness answer inadmissible.
The wrong-doer is liable for all damages resulting directly from the wrongful act, even if those damages could not be foreseen by the wrong-doer. Sometimes referred to as the Eggshell skull rule.
Because of the second finding, a new trial was again ordered. The third trial resulted in another appeal, and a fourth trial was eventually ordered. In all four trials, the jury found in favor of Vosburg.
Later years
After his retirement from the Supreme Court, Justice Lyon was appointed to the State Board of Control of State Charitable, Penal, and Reformatory Institutions. He became President of that board in 1898, and served in that capacity until 1903, when he resigned to move to California, where his daughter resided.
He died at his daughter's home in the Edenvale neighborhood of San Jose, California on April 4, 1913, and was buried at Oak Hill Memorial Park.[7]