This may be old, but, for what's it's worth, here's some information on the regiment:
The Twenty-fourth Iowa Infantry, sometimes called our "Temperance," sometimes our "Methodist" regiment was among the most distinguished of our Iowa commands. Colonel Byam, a clergyman of the Methodist Episcopal Church, was compelled to leave the service by reason of ill health in the summer of 1863
https://www.bing.com/search?q=Civil+War+%22Methodist+Regiment%22+&go=Submit&qs=n&form=QBLH&sp=-1&pq=civil+war+%22methodist+regiment%22+&sc=0-31&sk=&cvid=53E63A7E28D44B9BAC0723DDC40921CA
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24th Iowa Volunteer Infantry Regiment
https://en.wikipedia.org/wiki/24th_Iowa_Volunteer_Infantry_Regiment