Living with Shakespeare is filled with riches, some of them tantalisingly undeveloped, many of them hidden away in the 100 pages of appendices at the end. In Appendix 9, Marsh explains the context around two names on the tax listing: Poley and Maunder. These were government agents, small-time players in the Elizabethan underworld of spies and counter-spies, involved in the arrest and possibly murder of Christopher Marlowe, who was Shakespeare’s great predecessor and rival. A whole novel suggests itself here, or a terrible TV series: young Shakespeare among the spies and surgeons in a changing London. That is not the story Marsh is telling, but without his work — diligent, precise, oddly irresistible — we would not have it at all.