Hi Jenni,
Lovely to hear from you. Where to start? My family has the 'Mills' family bible so I will quote directly from the register.
Alexander Mills born 1784 county Fermanagh north of Ireland
Son of the above
George John Mills born 17th Aug 1811 Jersey
John Mills born 2nd June 1815 Guernsey (died)
Sarah and Elizabeth Mills born 8th April 1817 Guernsey
Alexander Mills born 22nd June 1819 Guernsey
Mary Ann Mills born 9th Nov 1821 Guernsey
Maria born 2nd Feb 1824 Guerney
James born 16th June 1826 (died) 7th Feb 1830 Guernsey
William born 28th June 1828 (died) 22nd Feb 1830 Guernsey
Joseph born 23rd Dec 1830 (died) 22nd Oct 1837 Guernsey
Thomas born 28th Feb 1833 Guernsey (killed in Guernsey harbour on board his vessel)
George John Mills married Ann Frampton 29th May 1834 Parish of St Helier. They applied for free passage and sailed to South Australia in 1839, with their sons Edwin and Alfred. George was a brickmaker/farmer. they had 7 children in total and I descend from their daughter Maria Suzannah.
Previously, I have had contact with descendants from your Alexander and Emily Emma Webb. These are the details I received.
Alexander Mills born in 1784 married Mary Eustace (born 1792 St Peter Port Guersey) married about 1818 in Ireland. (not confirmed)
Emily Emma Webb born 1813 Guernsey died 1901 Christchurch.
Emily's parents were Charles Webb and Maria Pyke (details not known)
Emily and Alexander had 10 children. Alexander's occupation tailor.
Some of the children were born in Timaru Canterbury New Zealand.
Of you James Edward Mills the tree states he was born 10th March 1841 in St Peter Port Guernsey died about 1919 (no further details)
I will try and re-contact previous researchers from your line, hopefully they haven't changed their e-mail address. Regards Alison.