Assuming Jane Clugston was c21 when she had her first child, then she would have been born c1866. IGI has a baptism at Rushen for a Jane Clugston on 19 NOV 1865. Parents: John Clugston and Anne Christian.
There is a 15 year Jane Clugston (Farm Labourer) living with her mother, Ann Clugston (Fisherman’s Wife) and four younger siblings in ‘Rushen’ in 1881. This Jane would therefore have been born c1866.