Following information courtesy of contributor 48689598 on 15 Sep 2019:
Louis Mahoney changed named to Louis Schauder jr as reported in the newspaper account of of his death. He is actually the son of Timothy and Annie Mahoney, and grandson of Louis Schauder.

The Drowning death of Louis Schauder jr.
As reported in The Rock Island Argus, Volume 55, Number 243, 27 July 1906
http://idnc.library.illinois.edu/cgi-bin/illinois?a=d&d=RIA19060727.1.3

BEGAN WITH JOKE
Drowning of Louis Schauder Follows Pantomime of a Quarrel.

DUE TO SEIZURE OF CRAMP
Goes Down in Sight of Friends. Who Thought Him Fooling, While Companion is Helpless to Aid.

The remains of Louis Schauder, the Davenport young man whose death by drowning in Rock river was mentioned in The Argus last evening, were found late yesterday afternoon. Coroner L. V. Eckhart was notified, and an inquest was conducted last night on Turkey island, just west of the canning factory in Rock river. It was shown at the inquest that Schauder drowned during a seizure of cramp. A foolish prank, intended as a joke on the young man's friends on the shore was the beginning of the incident that ended fatally for Schauder.

A Pretended Quarrel.
Young Schauder had been visiting with some friends at a camp on Turkey island Wednesday night and yesterday. About 1 o'clock he, with A. H. Benson, went in a boat to the main shore and visited Luchmann's saloon at Sears. They started back about 1:30, and in the boat Schauder proposed that they make their friends believe they were quarreling. "When we are about 50 feet from the island we'll pretend we are having a quarrel. I'll take an oar as though to strike you with it and throw it in the water. Then I'll jump in and you follow, and we will swim ashore." This was the plan proposed by Schauder, but Benson objected, as he had no change of clothing.

Fatal Pantomime Alone.
So Schauder decided to go through the pantomime alone. As the boat neared the shore, he picked up the oar, and with a motion as though to strike his companion, threw it in the water, and jumped in himself. Benson tried to reach the floating oar, but failed, and on turning around, was alarmed to see Schauder struggling in the water some distance away. He tried to reach the one remaining oar to the drowning man, but the wind carried the boat away, and Benson was helpless. Schauder went down before the eyes of his friends, those on shore believing until too late to save him, that he was fooling.

Second Seizure In Day.
Schauder was in bathing in the morning, and had at that time been seized with a severe cramp in the right side. He managed in the morning to get to the shore. The young man was 23 years old and resided in Davenport. He was a bartender at the Schauder hotel in that city. He was a member of the Davenport Elks. The remains were taken to Davenport for burial.

He Talked of Suicide,
The Davenport young lady who Schauder was engaged to marry today told of his having talked of contemplating suicide. She said that recently he had told her that everything was going against him, and that he wanted to die. Whether he carried out his threats of suicide, or was as supposed, seized with a cramp, is now a doubtful question, though the circumstances indicate strongly that his death was accidental. The young man's real name was Louis Mahoney. He lived with his grandfather, Louis Schauder, Sr., and recently assumed the name of Louis Schauder, Jr.