Thank you all for your help. Excellent The man's name is George Hodgson - and now I know that he was Alice's brother. His wife, Hetty, corresponded with my grandmother and through her, my gran found Grace. Hetty was indeed George's second wife - and he was her second husband.
It may be that Grace was remembering her birthday and place of birth correctly in that their passage may well have been arranged before her birthday in 1912.
I can now find more on Alice Hodgson. Thanks again. Grace's sons will be pleased too.