I'm wondering if John born 1845 (circa), Mary b1847 and Partick b 1849 could have Ann b 1841 or 1846 as another sibling?
Ann married Philip Smith - don't know where but their Dundee census entries have them born in Ireland. Ann and Philip had at least 5 children, one of whom - Johanna b 1876 - is my greatgrandmother. Johanna married James Orton Webster in Dundee.
Cheers
JudithE in Australia.