1) Western Pa. Genealogical Society Quarterly, Nov. 1983 vol.10 #2.
pg. "1894 Lawrenceville Presyterian Church 1940, Allegheny Co.Pa.. submitted by Mary Catherine Teese
In Honor Of The Men Of This Church Who Answered Their Country's Call 1861-5...
John Hoerr
George Hoerr...
The First Prebyterian Church of Lawrenceville (Boro) was founded in 1834. ( first one church, became another name, closed & merged)... It is now called the New Bethel M.E. Church....
Records of the First Presbyterian Church of Lawrenceville are held by the Prsbyterian Historical Society, 425 Lombard St., Philadelphis Pa 19147. Microfilm...Mormon Library..."
2) WPGSQ fall 1985 vol.12 #3
pg. 25 "Deaths At The Pittsburgh Infirmary From 1851-1878. Compiled by Gertrude Mohlin Ziegler
The Pittsburgh Infirmary was founded in 1848....first located in Allegheny City
pg. 32 1861...Hoer (Herr) John (male), age 37, (born) Germany, (death date) 26 Jul 1861"
3) Please go to Historic Pittsburgh; http://digital.library.pitt.edu/pittsburgh/
& do the full text basic search on your name for results.
4) I did not check but maybe http://www.lhs15201.org/