Sorry- missed the reply in amongst the posts.

I found this online but no indication that he was married-
John Epps taught 1904-1908, died Australia 1935, had family. After he died in Australia in 1935 his nephew, William Epps, sought to get them appraised by booksellers Maggs in London.
http://www.abc.net.au/worldtoday/content/2004/s1220082.htmAlso this family tree but think it's unlikely if John Epps was born c1823 then he was the man teaching in 1904-
John Epps left Kent early in life after obtaining his teaching degree. He eventually made his way to the Lyceum in St. Petersburg, Russia which was a high school for young nobles who were preparing for diplomatic life. During 1904 John was selected from the Lyceum to take the post of English tutor to the four Grand Duchesses, the children of Czar Nicholas II and Alexandria. That is a post he held until shortly before the tragic events of 1918. After John's death, a ring that had been presented to him by Czar Nicholas, was given as a bequest to Florence Dorothy Nutt, his grand-niece.
http://www.kent-opc.org/opcfamilydata/getperson.php?personID=I3012&tree=1