Accounts of Nathaniel Pigott and his son Edward were written by Agnes Clerke in 1895 for the Dictionary of national biography, and by Zdenek Kopal for the Dictionary of scientific biography. Both are incomplete and have errors of fact concerning the lives and scientific works of these men, these authors having relied largely on the published astronomical papers. When one of the present authors (A.M.) came to revise the accounts for the New dictionary of national biography, a wealth of biographical material was discovered in sources for Catholic history, and in those relating to Yorkshire and the City of York. The investigation has been shared with the other author (A.B.), who lives in Yorkshire. The personal lives of the Pigotts, and their continual movements between France, the Austrian Netherlands, Yorkshire and indeed several other regions of England, explain why their astronomical interests were so diverse, although several questions remain answered.