Just for reference because its very likely they are connected to this family save looking for them again.

http://search.ancestry.co.uk/cgi-bin...ki1861&indiv=1

http://search.ancestry.co.uk/cgi-bin...564604&recoff=

http://search.ancestry.co.uk/cgi-bin...448394&recoff=

There is a tree on Ancestry with these in they are descendents of a very old Cumberland family the name Sancton was taken as a first name - it originated with an uncle Philip Sancton, a successful London Merchant (how true this is I don't know). I expect the marriage Shona found is also connected. The other connection is that John Wood this Sancton's father was married at St Pancras Chapel.

Also if Edward Bell was a civil engineer who traveled to Cairo he may have something to do with the construction around that time in Egypt the Suez Canal however wasn't started until 1859!