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One of the useful documents to be found on the Devon area of GenUKI is "British Coastguards, 1841-1901":
http://www.genuki.org.uk/big/CoastguardsFrom there:
Blake, John born c1811, Ireland
1841 Bradwell ESS
1851 not found
1861 On pension at Worthing, SSX [RG9/0614/141]
1862 Death registered December quarter in Worthing district SSX
1861 - Wife: Mary E, 1817 in Ramsgate KEN. Children: Louisa, 1850 in Foulness Is. ESS; Job, 1856 in Pagham SSX.
1865 - Widow Mary Elizabeth Blake married William Kinch in March quarter in Worthing district SSX.
1871 - Mary E. Kinch with her husband William and son Job Blake in Broadwater SSX (RG10/1106/31).
1881 - Mary E. Kinch and husband William living in Broadwater SSX (RG11/1115/27).
1891 - Mary E. Kinch and husband William living in Broadwater SSX (RG12/0836/25.