Wendy,
Glad to help. This is my first (but probably not last) trip to Ireland. Can't wait to see where my family came from and get more information. I may be early September before I can email you back, depending on internet availability in the BB's we are staying in.
I checked on Ancestry and found a John Henry Leathem (b. 1869, wife Maude) who left Lisburn for the US in 1922, but no one else who fits your description. Will let you know.
Dennis