Hi, I found in the New York Foundling Hospital census for the year 1915 a Mary Kearn wf 30 yrs. old and also a Joseph Kearn wm 156 days old. This woman could have been his mother but I'm not sure and I don't know if this is the Joseph you are looking for. If it is, I'll give you the address to the NYFH and the OTHSA to get information on him.