Hi I have found the deaths and burials of a couple ( James & Lucy Gardiner) in Gap Road Cemetary. James died in 1916 and Lucy in 1925. 
I accessed the details of the burials on Deceased on Line and was surprised to see a baby was also buried with them. The baby, Dorothy Raven, died in 1894 - hers was the first burial in the plot. I have found her birth (June 1894)  and  Baptism which gives the names of her parents as Eliza and William Blakemore Raven. I presume this couple paid for the burial plot.
I know families did buy burial plots so members of the family could be buried together but I cannot find any link between this baby's family and the couple who died many years later. 
Were, I wonder, plots resold to others at later date?