I have an Alexander L. MADILL (c1809-1889) who married Mary Irene STEWART (c1820-1898). They had 8 children: Ann (c1838-?) Jane (c1839-?) Benjamin (c1842-1907) Mary (c1843-?) Eliza (1844-1920) my gr.gr.grandmother Ellen (16 June 1847 York, Ontario-?) your ancestor? Margaret May (1849-?) Alexander Stewart (1851-1938)
It looks to me that even with the year of birth difference, your Eleanor and my Ellen are the same person.