one would certainly suppose this account to be earlier than anything so far considered ( both from the fact that earendel 's history after his return from the great voyage seems to bear no relation to that in b and c , and from his voyage being set in the lands and oceans of the known world ) , were it not for the reference to the 'little book ' , which must mean 'notebook c ' , from which the outline c above is taken ( see p. 254 ) .