The Physician's Certificate of Death, issued in Evanston, Cook County, Illinois shows Patrick's last name spelled "Conners." A not uncommon spelling.
The certificate states he died in Evanston on March 28, 1880, which was a Sunday, at 7:45 p.m. He was married. Although his wife's name is not listed, he was married to Margaret Welsch Connor (1825-1890). Given he is thought, at the time of his death, to be 56 years, 3 months and 7 days old, this would calculate a birth date of December 21, 1823.
It also states he was born in Ireland and had resided in Illinois for 28 years. From what I can tell, the Connors came directly to Illinois from Ireland which would give a c1852 immigration date.
The cause of death is given as "exhaustion from tuberculosis" which the certificate says he had for fifteen years. He was buried in Calvery Cemetery, Evanston, Illinois. The undertaker was John Hebbelthwaite located on Davis Street in Evanston, IL.
Source: Family History Library, digital folder #004004754, image #01216.
