This book was owned and used by Simon H. Ottenhausen. He was a Lieutenant and later a Captain of Company L of the Illinois National Guard who were attached to the 6th Infantry and sent to Cuba in July of 1898 and later to Puerto Rico.
In the photo, he’s one of the Jr. officers at the back of the formation.

The photo...

That is some neat stuff. Here is where he was recognize when promoted to 1st Lt. in 1897 on page 739.

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I'm from rural Freeport, IL.

Here is an obituary for him:
SIMON H. OTTENHAUSEN
Stricken while at his desk in the W. T. Rawleigh company plant yesterday afternoon, Simon H. Ottenhausen, 68, a Spanish American war veteran and a lifelong resident of Freeport, died suddenly about 3:30 o'clock. Mr. Ottenhausen, who was a foreman at the Rawleigh plant was found seated in a chair by fellow workers. He had been connected with the company for the past forty years. He resided at 715 West Avon street. Funeral services will be held at the Walker mortuary, West Main street, at 2 o'clock Monday afternoon. Dr. Edwin A. Arends pastor of St. John's Evangelical and Reformed church, will conduct the services and interment will be made in City cemetery. The U.S.W.V. will conduct services at the grave. Friends may call at the mortuary. Mr. Ottenhausen was born in Freeport May 2, 1873, the son of Mr. and Mrs. August Ottenhausen. He was educated in Freeport schools and was united in marriage in 1896 to Miss Anna Hauth, who survives. He also leaves one daughter, Mrs. Ray Harkness, Shirland, Ill. There is also one grandson. Four sisters and three brothers survive, Mrs. August Schmidt, Mrs. Robert Moore, Mrs. Otto Heusing, Mrs. Arthur Landgraf, Fred, Henry and George Ottenhausen, all of Freeport. He was a member of the old Company L. I.N.G., and served in the Spanish American war with that company being a first lieutenant. He was a member of the company for many years and took an active interest in the affairs of that organization. He was affiliated with Albert E. Schmidt camp No. 4, U. S. W. V. [Contributed by Karen Fyock - November 29, 1941 clipping]

Thank you for all the Great information!
I found the book on eBay and I found the picture on line.
There seems to be a lot more on line about his unit and himself.

Nice piece of Krag history, Fred. Thanks for sharing.

I searched and found my copies of Rules For The Management for the Krag, 1898 and Springfield Trapdoor and Army Pistol, also 1898. Filled with tons of detailed info about these firearms.

My Krag manual is labeled inside the cover belonging to the Preparedness Club of Cleveland. Not as interesting a previous owner as yours!

Here is a list of the men in the unit

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Is the monument marking the site of the Lincoln-Douglas Debate still standing at Freeport, Illinois?
(I suspect the homes are gone and the area is now 'developed city' surrounding Freeport's "Debate Square").

A 1903 Presidential dedication of "Debate Rock", with "TR" in the neighborhood. (Copyright date is misleading).

Apparently, the plaque was put on the two-ton rock in 1902. The dedication by President Roosevelt occurred in 1903.

Maybe, the photo of Company L - Indiana National Guard was taken at 1902 or 1903 events, rather then in 1898, when "Co. L" first returned home from Cuba & Puerto Rico? 

Neat thread!