James Griffin and John Wren
Some of your readers will be familiar with the problem. You set aside a few days to get to the National Library to pursue a research project. You obtain the manuscripts, order the material in the Petherick Room, and settle down to uninterrupted industry, when an avuncular bore with too much time on his hands buttonholes you and bangs on about his own project. You do not wish to appear uninterested, yet hope that the windbag will leave you alone and get back to his own table, perhaps even write the book that he rehearses so insistently as the precious minutes tick by.