C1 : Who he?
C2 : And he?
C3 : Of what were they both early advocates?
C4 : Which tunnel?
C5 : What does it have in common with C1?
C6 : What place name (apart from London) connects all three pictures?
C7 : What canal?
C8 : What canal?
C9 & C10 : Which two men were involved in both?