They had at least five children.
Mary, John, William, Phillis and Agnes
On at least two of the childrens' BC they are registered as illegitimate.
In the 1881 census (Edinburgh St Cuthberts) Elizabeth Mckenzie with two of the children Phillis Lockhart and Agnes Lockhart
In the 1891 census (Edinburgh George Squ) Elizabeth Lockhart now described as a widow with her daughter Phillis and a grandson.
On Elizabeth's DC 1894 she is described as Widow of John Lochart ---
My problem is I cannot find a MC for John amd Elizabeth, nor a DC for John.

Any help advice woild be appreciated.
Frances
