James Doyle - the one who went to Toledo, OH

I have found the following birthdates for James Doyle:

• 1861 census    age 26 - birth year 1835
• 1871 census    age 26 - birth year 1845
• 1871 marriage  age 34 - birth year 1837
• 1881 census    age 40 - birth year 1841
• 1885 Civil Service List - birth year 1839
• 1891 census    age 52 - birth year 1839
• 1900 census    age 63 - birth year 1837

Presumably, either 1837 or 1839 is the likely year of his birth.  I've chosen to go with 1837.