His father's keeper …

… Christopher Tolkien and the legacy of his father J.R.R. Tolkien: The Steward of Middle-earth. (Hat tip, Dave Lull.)

… after more than 40 years, at the age of 94, Christopher Tolkien has laid down his editor’s pen, having completed a great labor of quiet, scholastic commitment to his father’s vision. It is the concluding public act of a gentleman and scholar, the last member of a club that became a pivotal part of 20th-century literature: the Inklings. It is the end of an era.