my 5x great grandmother was Agnes Auchterlonie, married to James Lock; they had six children, all born in Liberton, Midlothian, between 1751 and 1761. Agnes has been my brick wall for a long time, which is really frustrating considering her unusual name. I have found a possible birth for her in South Leith, Midlothian in 1717. her marriage to James Lock would seem to distance her from the Auchterlonies in Fife, as the Agnes Auchterlonie there married James Fyall.
I don't think this is going to help anyone - but it is good to unload the frustration to people who are finding the same difficulties!