This is an image of a 1772 caricature of Sir <a href="//commons.wikimedia.org/wiki/Joseph_Banks" title="Joseph Banks">Joseph Banks</a>, published by M. Darby.
M. Darby?
1772
The image from which this image was obtained is available through the National Library of Australia's website <a rel="nofollow" class="external text" href="http://nla.gov.au/nla.pic-an9283268">here</a>. The NLA image contains a strip of spurious attribution and indexing information along the bottom. This is a cropped version that eliminates this.