Elizajb
You say the occupation changes and Mary has a farm and land later,after 1853,as her father dies in 1853,(auctioneer) I wonder if they inherited some money or land ,I have researched her father briefly,and come up with nothing substantial ,it might be an idea to look up a possible will for John Blake,I have very little knowledge when it comes to research,I just look at every thing and any thing for clues,
some thing else may turn up,