I pulled this from the interesting review...
Obvious sources like previous histories, club archives and contemporary magazines and journals are explored. So too are the more obscure family wills and registers, legal documents and submissions, shipping rosters and burgh records, to give understanding of context and relationships between events: the effect of the financial adventures of an early English professional in St Andrews on the establishment of Tom’s business; the importance of the Prestwick connection on the wider development of the Morris family fortune; Tommy’s unexpected and surprising choice of bride; the reclamation and embankment of the Swilken Burn and its importance in the evolution of the present layout of the Old Course.
Shipping rosters? Unexpected and surprising choice of bride? What's the backstory on these topics?