Historian Robin Law, in contrast, argues that there is no clear evidence of motivation by Agaja opposing the slave trade and that the conquests of Allada and Whydah may have been simply done to improve Agaja's access to economic trade. Law contends that the disruption in slave trade that followed the rise of Dahomey was not necessarily related to any efforts on their part to slow the slave trade, but was simply due to the disruption caused by their conquests. Law believes in the authenticity of the Bulfinch Lambe letter, but contends that Atkins misinterprets it. In addition, Law doubts the self-defense motivation highlighted by Davidson and Akinjogbin, writing: