Here is just a little information on the Harvey side of this family. Elizabeth Harvey had a sister Janet (Jessie) who married John Stevenson. This information has been extracted from the burial records of Cambusnethan cemetery in Wishaw.
I hope it is of some use. All dates are of interment.
JANET STEVENSON, housewife, Cambusnethan. Aged 59 years. Married.
Parents - William Harvey & Marion Chalmers.
Interred in the Private Burial Ground, plot 355, on 28th November 1906.
JOHN STEVENSON, coal miner, Cambusnethan. Aged 65 years. widower.
Parents - John Stevenson & Christina Greenshields.
Interred in the Private Burial Ground, plot 355, on 5th October 1909.
JOHN STEVENSON, Cambusnethan. Aged 4 months.
Parents - John Stevenson & Janet Harvie.
Private Burial ground plot 355 on 29th June 1869.
WILLIAM H. STEVENSON, Cambusnethan. Aged 2 years.
Parents - John Stevenson & Jessie Harvey.
Private Burial ground plot 355 on 25th July 1872.
MARION C. STEVENSON, Cambusnethan. Aged 19 years. Unmarried.
Parents - John Stevenson & Jessie Harvey.
Private Burial ground plot 355 on 8th June 1893.
This is a picture of the "Walled Private" as it was called. I don't know the exact location of the Stevenson plot, sorry.