After Boston, he migrated to the Michigan Territory where he opened a school which became a first in what is now Minnesota.
He then became an Indian Agent for the Sioux Agency, and he even took a French-Indian who he called his "wife" although they were never married but who gave birth to a son. They named him Charles.
For some reason, maybe a real interest of medicine, he resumed his study of medicine with a Dr. Purcell in Fort Snelling.
Then later in Wisconsin, he got involved in the Black Hawk War between the Sioux and their rivals the Fox and Sauk tribes. And yes, his involvement put him on the run!
He was actually blamed for a massacre of the Fox and Sauk tribes by the Sioux. As a result, he fled to Illinois.
Then while there he abandoned his mistress who was again pregnant. It is said that she tried to walk several hundred miles to rejoin him, but the journey was too much for her and it honestly killed her as she and the child died in childbirth.
John Marsh decided to give his small son to a family in Illinois to raise, and then once again he became involved in Indian affairs.
Difinitely not one above making a dishonest dollar, the people there soon discovered that he was selling guns illegally to the Indians. So again he fled the territory, but this time settling in Independence, Missouri, where he became a merchant of some sort.
Massacres? Selling guns to Indians? Abandoning his "wife" and child? He sounds like the type of man who was one step ahead of a hangman's noose and short drop.
When his business went under in 1836, he joined the American Fur Company to Santa Fe, New Mexico. Through them he made his way to Southern California, via the Santa Fe Trail.
In Southern California, John Marsh found that he was the only person who had any knowledge of Western medicine. So he passed himself off as a "doctor."
He even went so far as to present his Harvard degree to the local Mexican Government of Alta California. Since the degree was written in Latin, which none of them could read, they took his word and granted him permission to practice medicine. Imagine that!
Thought many so-called "doctors" of the time did not have Medical Degrees, this was a heck of a scam.
As "Doctor" John Marsh, he was quite successful in his new profession. Although it's said that his prices were very high. In fact sometimes he'd charge as much as a single head of cattle to deliver a child.
Nevertheless, and yes believe it or not, John Marsh is credited as being the first person to practice Western Medicine in California. Imagine that!
Not surprisingly, he eventually made many enemies in Southern California and fled to Northern California in 1837 and settled on the eastern side of Mount Diablo in what is now Contra Costa County.
There in 1838, he acquired the Rancho Los Meganos Mexican land grant from Jose Noriega on what is now called Marsh Creek on the western edge of the town of Brentwood.
This time though, he finally prospered. This in spite of once again engaging in shaddy business practices of again charging higher than normal prices for routine medicine. Heck, he may have been the first doctor in California known for gouging his patients. A tradition that has now spread across the United States.
There is some evidence that he cared for some of the survivors of the Donner Party while living near Mount Diablo, but again I can't verify this.
Through his shaddy business dealings, Marsh actually acquired tens of thousands of head of cattle and lived the life of a wealthy Ranchero. In addition, he paid very low wages to his workers. Who in fact he was also known to have preformed corporal punishment on with either whip or lash when he felt crimes had been committed on his ranch.
Many of his workers, especially the Vaqueros, hated him.
It is said, that in 1841 when the first American emigrant party, the Bartleson-Bidwell Party arrived in California that "Doctor" Marsh invited them to be his guests. That is said to be the reason that the California Trail terminated in Brentwood.
Supposedly he worked behind the scenes to promote American Statehood and in March 1845 wrote a letter signed by himself and 23 other expatriates announcing a clandestine meeting to take place on the Fourth of July.
That letter has now been designated as the “Call To Foreigners” by modern historians. While Marsh does not take credit as the author of that letter, most California Historians agree that he wrote it. According to the letter, the purpose of the clandestine meeting was "promote the union and harmony and best interests of all the foreigners resident in California".
During this period he began wealthy beyond his imagination, and among other endeavors he actually began a search for his son Charles.
In 1851, the Reverend William W. Smith introduced "Doctor" Marsh to Abigail "Abby" Tuck who was a school teacher from New England. She also served as Principal at a girls school in San Jose.
After a brief courtship, yes only two-weeks, they were married. On 12 March 1852, she gave birth to a daughter and they named her Alice.
The new family began construction of a magnificent mansion built entirely of stone quarried from the nearby hills. His wife, Abby, chose the location of the home because of the view of the surrounding valley and Mount Diablo which sits just a few miles south of the present city of Brentwood, California.
Abby died, however, before their mansion was completed. Marsh ultimately moved into the new place, but he ended up only living in their mansion for about three weeks.
So what ever happened to "Doctor" John Marsh?
Well he became active in California politics, which should not come to a surprise to anyone that a crook and swindler would enter politics.
Then on September 24th, 1856, wealthy politically respected "Doctor" John Marsh began a trip that started on his land in Eastern Contra Costa County and was supposed to end in San Francisco where he was to garner a political appointment of some sort.
It is not known exactly what appointment that was, but that doesn't matter because on that day Marsh's luck ran out.
Some say he was actually ambushed, but in either case "Doctor" Marsh was murdered that day by three of his Vaqueros over their disputed wages.
Shortly before Marsh's murder, a young man approached his door seeking shelter from a harsh storm. Supposedly it was his son Charles.
He had journeyed to California in search of his father, and once there they enjoyed a happy reunion. Legend has it that Charles tracked down his father’s murderer, Felipe Moreno, and brought him to justice.
And as for Alice Marsh? Well she was entrusted to the care of others at Marsh’s Landing which is not far from the present day city of Antioch, California. She ended up marrying and staying in the area.
Both of the Marsh kids let the Mansion go into disrepair. But then it was picked up and no the Marsh Mansion still stands as part of Cowell Ranch/John Marsh Property State Historic Park.
The park has applied for status as a National Historic Monument, why not after all the Marsh Mansion is on the list of National Historic Places.
Today, there is Marsh this and that. Believe it or not, there is a California Historical Landmark plague number 722 that still marks the site where "Doctor" John Marsh was murdered.
Today, yes there is also an elementary school in Antioch, California that is named after Doctor John Marsh. And yes, there's a Marsh Road or maybe two, and there's even Marsh Landing.
In fact, California State Route 4 which bypasses the cities of Oakley and Brentwood out here has been named the John Marsh Heritage Highway in honor of Doctor John Marsh. Imagine that!
It's an interesting legacy for a man from Massachusetts who always seemed to be one step ahead of a hangman's noose or a bullet until his luck ran out.
Story by Tom Correa