In terms of the children I am seeing following the 1800 marriage of parents:
John b. 1800 - 1867, m. Christina Wright
James b. 1802 - ?, m. Elizabeth?
Colin b. 1803 - 1867 m. Elizabeth Gray. Showing as 3rd child in the OPRs
Lillias b. 1806 - ? Showing as 4th child in the OPRs
Catherine b. circa 1810 - 1876 m. John Richardson
Thomas b. circa 1811 - 1892 m. Elizabeth Campbell
Monica