Britain and the USA sign the Clayton-Bulwer agreement. In this
treaty, both states agree not to obtain exclusive control of a
proposed canal between the Pacific and Atlantic oceans.
Citation:
Editors. "Britain and USA agree to share a proposed Panama canal".
The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=18235, accessed 19 June 2013.]