Communication and External Relation

Russell's theory of 'External Relations' presupposes a relation between Internal and External.  Now, that relation cannot be Internal, since, by definition, any Internal Property is independent of any External Property, including Relation.  Hence, the relation between Internal and External must be External.  But,  'External' means 'Contingent'.  Thus, insofar as Communication is an External Relation, while Logic is a system of Necessary Propositions, independent of its being symbolized, the thesis that Communication is contingently related to Logic is itself contingent, regardless of Russell's ambitions.