Hi TYDU,
I've been looking into Ann Rosser (Leech) and there are hints that she was indeed the older sister of Henry Chadwell Rosser. HCR married a Mary Ann Baynham in 1832 and together they had 10 children, however HCR met an Elizabeth Goodwin from Shobdon and had a child by her : Edwin H Rosser, born in Weobley, Herefordshire in 1850. The 1851 English Census shows Ann Leech as Head of family with her daughters living in Leigh. At this time HCR is living with his wife and family in Ledbury. Staying with Ann Leech in 1851 was 11 month old Henry Goodwin, born in Weobley, Herefordshire and also a pauper lodger Elizabeth "Chadd" aged 20. A coincidence? HCR must have left Mary Ann Rosser after 1851 as he and Elizabeth went on to have 8 children.