ABSTRACT The erudite James Burnet, Lord Monboddo (1714–1799), member of the Select Society and judge of the Court of Session in Edinburgh, wrote many pages about the existence of ‘men with tails’ and orang-utans’ humanity. For this reason, he has been labelled as ‘credulous’, ‘bizarre’ and ‘eccentric’ both by his contemporaries and by modern scholars. In this paper, I shall try to take his argument seriously and to show that throughout his work Monboddo searched for evidence. If his belief in (...) mermaids, giants, blemmyes, daemons and oracles was far from reflecting the general attitude of the age of Enlightenment and empiricism, Monboddo contributed to place the ‘science of man’ at the centre of the map of knowledge, where Nicholas Phillipson had also located it. He did this by emphasising the variety and historicity of humankind and stressing how mind and body changed over time and space. This article is also an attempt to connect Monboddo’s erudite production with his position as a lawyer and a judge. I shall argue that Monboddo founded his ‘science of man’ on an epistemology of legal evidence, employing the same inquisitive approach that he practiced at the bar and in the court. (shrink)