The Australian torpedo launch <i>Acheron</i> was built by the Atlas Company in Sydney. It was described briefly in the periodical <i>Engineering</i> on July 18, 1879, page 52, along with this illustration.
Unknown illustrator of the time
Engineering, 1879-07-04, after page 52, <a rel="nofollow" class="external text" href="http://www.gracesguide.co.uk/images/7/74/Eg18790718.pdf">Link to file at gracesguide.co.uk</a>