made at the time by himself". Aistrop described Jacco as "canine mouthed and much larger than the common monkey". The most accurate depiction of Jacco Macacco would seem to be an etching in the collection of the British Museum (asset number 1174054001) described as 'Head of a fighting monkey called Jacco Macacco in three-quarter profile to right, with slightly open mouth, wearing a collar. 1826'. This detailed etching shows up on a Google image search for 'Jacco Macacco' and shows a monkey with a pronounced muzzle and a distinctively pointed ear. The general impression appears to be consistent with the subject being a Macaque of some type (most likely a Barbary Ape, Rhesus Macaque or Bonnet Macaque). The monkey's face in this etching is similar in appearance to the head of the monkey shown in the Landseer etching. The relatively short tail length indicated by Landseer would appear to point towards an identification as a Rhesus Macaque (Barbary apes have only vestigial tails and Bonnet Macaques have long tails). Rhesus Macaques adapt well to the presence of humans and often live in or near urban environments, which may explain Jacco Macacco having come into the possession of a sailor (presumably while on shore leave in a port). The Alken depiction is also broadly consistent with an identification as a Rhesus Macaque. However, Rhesus Macaques are relatively light in colour (both in fur and skin) which seems inconsistent with, for example, Lennox's description and Cruikshank's depiction of a darker pigmentation. As mentioned above, Cruikshank's depiction of the monkey is indistinct and the coloration (black monkey vs white dog) may be more for the sake of clarity than as a reflection of historical reality. The British Museum etching and the Landseer depiction, both of which appear to have been made taken from life (and attempt to show the actual monkey, rather than a generic simian) would seem to be the most accurate means of attempting an identification at the present time. Alternative identifications such as Gibbon, Mandrill, Baboon or Lemur do not seem to be borne out by the various pictorial depictions. The term Macacco was in use as a general term for a monkey at the time; it came from the Portuguese macaco meaning "monkey," a derivative of a Bantu word that had been exported to Brazil where it was used to describe various type of monkey in the 17th century.