Dear Tom,
You have failed to make a logically defendable and objective argument for your case. This has nothing to do with whether or not I agree with your assessment of the facial characteristic on the proffered Charles Comiskey. Assumptions are made when there are gaps in your factual information, but as more of the argument relies on assumptions, the weaker the argument is and less convincing it is likely to be.
FACT: Charles Comiskey played in Dubuque during the period of 1878-1881.
FACT: Charles Comiksey would have been 19-22 during this period.
Assumption: The person you have identified in the image is in fact Charles Comiskey.
Assumption: The person identified as Charles Comiskey is between 19-22.
Thus you are offering an argument that says since Comiskey played in Dubuque in 1878-1881, and was 19-21 during this frame, and I believe that the person identified as Charles Comiskey appears to have certain facial characteristics that feel are consistent with what I believe he looked like at this point in time and age, then this must be Charles Comiskey while in Dubuque during the time frame in question.
You can use assumptions to bridge information gaps, but you cannot use them as confirmations of other assumptions in order to establish facts. Facts must always stand on their own merit. Facts are also used to establish context or a nexus between various facets of information offered in an argument.
A much stronger argument would start with a fact that:
This photograph was taken in Dubuque during the period of 1871-1881. This can be substantiated by the photographer/studio information or the some other contemporary annotation.
Then there might be some logical progression to the inferences you make about the age and facial characteristics. Your theories on the pedigree of the image and the assumed travels of it from Dubuque to St. Louis are not relevant to the fact pattern since they do not objectively confirm the date or location of the point of origin of the photograph (when and where the picture was actually taken).
Dave Grob
DaveGrob1@aol.com