Castalia
... that although she was unsuccessful as a cross-Channel ferry, Castalia served for twenty years as a hospital ship?
... that although she was unsuccessful as a cross-Channel ferry, <b id="mwB14"><a about="#mwt38" data-mw='{"parts":[{"template":{"target":{"wt":"PS","href":"./Template:PS"},"params":{"1":{"wt":"Castalia"},"2":{"wt":""},"3":{"wt":"2"}},"i":0}}]}' href="./PS_Castalia" id="mwB18" rel="mw:WikiLink" title="PS Castalia" typeof="mw:Transclusion"><i>Castalia</i></a></b> served for twenty years as a hospital ship?