HMS Imogen explained

Six ships of the Royal Navy have been called HMS Imogen or HMS Imogene. A seventh was planned but never built:

• was an 18-gun sloop, originally the French privateer Diable-a-Quatre. She was captured in 1800 and foundered in 1805.
• was a 16-gun brig-sloop launched in 1805 and sold in 1817.
• was a 28-gun sixth rate, originally named HMS Pearl, but renamed in 1826 and launched in 1831. She was burnt by accident in 1840.
• HMS Imogene was to have been a wooden screw corvette, ordered in 1861 but cancelled in 1863.
• was a Coastguard vessel launched in 1864. She was renamed HMS Argus in 1884 and was sold in 1903.
• was an iron screw yacht, formerly the Jacamar, built in 1882 by Barclay, Curle & Co, Glasgow. She was purchased in 1882, renamed HMS Impey in 1919 and was sold later that year.
• was an launched in 1936 and sunk in a collision in 1940.