According to the plot owners book (dating from about 1875 - 80) the owner of the Morton family plot was Gavin Morton. There are 3 entries in the plot book - (all dates are of burial)
In the South lair - MARY GIBB, aged 10 years, 31st July 1890.
In the Centre lair - ROBERT MORTON, aged 61 years, 28th February 1880.
In the Centre lair - MARY MORTON, aged 86 years, 25th May 1908.
From information in the gravediggers Day Book -
MARY MORTON, Crindledyke, aged 86 years, widow.
Parents - Robert Hill & Elizabeth Rowan.
Buried in the old churchyard 25th May 1908.
GAVIN MORTON, Crindledyke, aged 21 months.
Parents - Robert Morton & Mary Hill.
Old churchyard, 7th September 1864.
ROBERT MORTON, apprentice mason, Crindledyke, aged 18 years, unmarried.
Parents - Robert Morton & Mary Hill.
Old churchyard, 30th August 1873.
From the Day Books of the Municipal cemetery at Cambusnethan.
Plot C30. (3 burials)
GAVIN M. CLEGHORN, Crindledyke, aged 3 months.
Parents - William Cleghorn & Janet Morton.
25th November 1879.
JANET CLEGHORN, housewife, Crindledyke, aged 30 years, married.
Parents - Robert Morton & Mary Hill.
24th December 1880.
MARY CLEGHORN, Crindledyke, aged 5 years.
Parents - William Cleghorn & Janet Morton.
3rd January 1881.
Plot B575 (1 burial)
JEANIE MORTON GIBB, Shotts, aged 26 years, unmarried.
Parents - John Henry Gibb & Mary Morton.
3rd February 1914.
Plot B575 owned by John H. Gibb, foreman engineer, Rosbank Cottage, Hill road, Shotts.
Hope this helps a little,
Lodger