Herbert J.C. Grierson Yes, that Herbert Grierson. I wondered why someone called ‘John Clifford Grierson’ in my genealogy database went by Sir Herbert Grierson in ‘The Letters of Letitia Hargrave.’ Sir Grierson, as it turns out, was married to my third cousin thrice removed, born Mary Letitia Ogston. Mary Letitia Ogston is the daughter of …