I’m including this summary really just for the sake of completeness and because a colleague happened to be reading the book and was willing to scan me the brief relevant section. The book as a whole (as might be determined from the title) looks at the ways that marriage relationships are represented and symbolized in medieval tomb sculpture. In the chapter on “The Double Tomb” there is a section entitled “Queer Tombs” that specifically looks at commemorations of same-sex pairs.