Thanks to all who replied to this topic.
Henry did survive the 1851 census but was at sea at the time and did not return to England until July of that year. The 1851 Census shows Elizabeth and son George living at 16 King Street Torpoint.
Henry's story can be found here:
http://www.stoneyburn.ca/Sheppard_etal/Bio/SHE_Bio_01.php I'm having second thoughts about Henry's claim to 'Falston' in Devon that nobody seems to have heard of, not even Google.
I'm beginning to think that 'Falston' isn't a place at all but an interpretation Folkestone. When asked where he was from Henry may have said 'Folkestone' meaning the ship then added Devon as his home. The person signing Henry on to the Druid either heard it a Falston or just couldn't spell Folkestone.
At the time (February 1841) there was a merchant ship the FOLKESTONE chartered to and later in 1841 bought by Jardine and Matheson for the opium trade, which left London 4 Oct 1840 (The Morning Post (London) Tuesday 6 October, 1840) "Custom House, Oct.4 ... Cleared Outwards With Cargo.-- The Folkestone, Jolly for Macao;". Reported in 'China' on 31st January 1841 and left Macau 28 February 1841 for Singapore. Henry signed onto the Druid on 18 Feb 1841.
Now, if possible, to find a crew list for the Folkestone.