Hi
This is NOT exactly what you were looking for, but the coincidence of the names McMICHAN & BLACK in this memorial inscription may be of some interest to you. Does it fit with any other aspects of your research into these families?
Cheers,
Sy
Location:Dunrod Graveyard, Kirkcudbrightshire
Erected by James Black McMICHAN
In Memory of Isabell Black his daughter, spouse to William ALEXANDER,
who died at Balmea 18th Dec 1839 aged 30 years
Also their daughter Mary, who died in infancy
Also Janet Black his daughter, who died at Balmea 15th Oct 1810 aged 25 years
[Age and/or death year could be incorrect (c.f. parents, siblings)]
Also James and Elizabeth his children, who died in infancy at North Milton
Also Susan Black their daughter, who died at Balmea the 7th Oct 1849 aged 27 years
Also Mary MITCHELL his spouse, who died at Castle Douglas 16th March 1857 aged 72 years
Also the said James Black McMICHAN, who died at Castle Douglas 6th September 1861 aged 72 years
John McMICHAN his son, who died at Balmea, Bowmans Forest, Australia, 5th August 1864 aged 47 years