While Edwards was in Arizona he was continually on the alert for story material. The sun, sand and solitude of the country "God forgot" produce types to be found nowhere else. He ran out many a trail that led from adobe-walled towns into waterless deserts and bleak, cacti-covered hills to end finally at some mine or cattle camp. It was on one of these excursions that he was told how a company of men had built a dam at a place called Walnut Grove. This dam backed up the waters of a river and formed a huge lake. Mining for gold by the hydraulic method was carried on profitably in the river below the dam. One night the dam "went out" and a number of laborers were drowned.
With this as the germ of the plot Edwards worked out a story. He called it "A Study in Red," and it purported to show how a lazy Maricopa Indian, loping along on his pony in the gulch below Walnut Grove, gave up his mount to a white girl, daughter of the superintendent of the mining company, and while she raced on to safety he remained to die in the flood from the broken dam.
The story was published in Munsey's Magazine. Six years later the author received a letter from the Maricopa Indian Reservation, sent to New York in care of the F. A. Munsey Company. The letter was from a young Maricopa.
"I have often read the account of my father's bravery, and how he saved the life of the beautiful white girl when the Walnut Grove dam gave way. I have kept the magazine, and whenever I feel blue, or life does not go to please me, I get the story and read it and take heart to make the best of my lot and try to pattern after my father.
I have long wanted to write you, and now I have done so. I am back from the Indian School at Carlisle, on a visit to my people, and am impelled to send you this letter of appreciation and thanks for the story about my father."
Now, pray, what is one to think of this? The letter bears all the earmarks of a bona fide performance and was written and mailed on the Reservation. Edwards' fiction, it seems, had become sober fact for this young Maricopa Indian. Or did his father really die by giving up his pony to the "beautiful young white girl?" And was Edwards' prescience doing subliminal stunts when he wrote the story?
John Peter, should this ever meet your eyes will you please communicate further with the author of "A Study in Red?" It has been some years now since a letter, sent to you at the Reservation, failed of a reply. And the letter has not been returned.