Hmm, William Curven Blessed was buried 17 Sep 1841 at St John the Evangelist, Lambeth, age 38, abode Roupell St:
London burials
and a possible for George: George Blessed buried 26 Jun 1846 at St Luke, Finsbury, age 43, abode workhouse:
London burial records
So could Jabez and Charles have been kept in touch with each other via their brothers at first?