A couple of warnings.
The preamble is long and convoluted, and the solver might be tempted to think that Mark, Francis & Robert are three of a kind. But Robert belongs to a different field.
Robert's title didn't necessarily refer to the same R as is subject of the novel. I may be wrong on that, but not sufficiently interested to check it. For the full title of the 3rd hider, think again in terms of the novel.
The location is not the location any longer...Didn't they dig him up ?