one of those which he attacked was seen to go down in a spin.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span>[</span>6<span>]</span></a></sup></dd>
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<p>After leaving 9 Naval for England, Simpson flew Home Defence sorties from <a href="//en.wikipedia.org/wiki/RAF_Cranwell" title="RAF Cranwell">RAF Cranwell</a> during the latter part of 1917, though without results. He then became a test pilot at <a href="//en.wikipedia.org/wiki/RAF_Martlesham_Heath" title="RAF Martlesham Heath">RAF M