The Memoirs of the Reign of Bossa Ahadee, King of Dahomy of Robert Norris, first published in 1789, is a history of the west African kingdom of Dahomey during the reign of Tegbesu (“Bossa”), dated by Norris to 1732-1774 (though the correct dates are now known to be 1740-1774). In addition to its separate publication in 1789, Norris' material was also included, in a revised form, in the more comprehensive History of Dahomy compiled by Archibald Dalzel, published in 1793. This second version incorporates numerous detailed alterations and elaborations, mainly stylistic but occasionally relating to matters of substance; according to the Editor of Dalzel's History, these revisions were the work of Norris himself, although he had died before the work was brought to publication. This incorporation of Norris' work into that of Dalzel has had the effect of diminishing his reputation and perceived importance, since his material has usually been cited through (and by implication attributed to) Dalzel, rather than directly under his own name. His Memoirs, however, clearly have immense historiographical significance, as the first serious attempt by a European to write the history of a west African state.
In addition to its purely historiographical interest, Norris' work remains an important source for the history of eighteenth-century Dahomey. Its value as a historical source, however, is problematical. On the one hand, Norris, as a slave trader who had operated in Dahomey for several years, had claims to be an exceptionally well-informed observer of Dahomian affairs.