Hi Deb The area you are trying to explore in London is not easy,in those days it was a rabbit warren of small streets and yards, the gentleman who got robbed lived at Coburg Terrace Poplar in the parish of St Marys,but he said he was dinning with friends and was on his way home,the Mill Yard mentioned is likely to be the one off Cable Street,which is probably the most notorious street in the East End of London,the man would have been about 3/4 of a mile from his home,to reinforce that the policeman was from H division the famous Ripper division based at Whitechapel which covered the are area where you ancestor was arrested,just where you start looking for the family back from Jane will be difficult,I would try Ancestry,they have the London Parish records online,at least you have a rough idea of her age the target area will be any of the parish along the Thames from Wapping to St George in the East,and also Stepney ,Poplar,and Ratcliff,to name a few,one thing for sure your ancestor did herself a lot of good being transported to Australia,her life in that area of London in those days would have been short.