From the birth certificate ref. no. as given with all the
details given you can buy a copy from the Registry
of BMD in Douglas for £6.
The birth was registered by baby's mother apparently
resident at address given .Castle Mona was a grand
hotel on Douglas Promenade. The laundry was in a street
leading to it behind a row of guest houses/small hotels
on the prom.
Do you have the 1900 Nordland / Aitkin census details.???
I see George is listed as eldest Watson of 10/6living.