Yes, I believe it does. However, judging by the age she is at death and William too, she cannot be the one Lawrence was referring to, if it was he who put the add in the paper. Also, there is a Margaret born to John and Margaret here in 1860 something and this is who I believe it is. I'll need a fresh mind when looking at this one.
Also, I am sure that I have done a lookup at Waverley Cemetery for Joseph - son of John and Margaret - and Elizabeth. I think it was related to EGGINS on the headstone. I will search Rootschat to see if I can find who else is looking it them.
Jamjar