-2- The chief argument against compulsion is the fear entertained by the Foreign Office that Germany and other enemy states might start reprisals against British subjects now in their countries. Personally I should have doubted whether there are many British nationals at large in enemy countries, apart from those with enemy sympathies, but there might be a risk of such reprisals being extended to British subjects now interned. There is the further argument that fire prevention duties allow opportunities for sabotage in conditions where persons, if ill-disposed, are not subject to the same supervision as when they are at work, and no one can guarantee the trustworthiness of any individual alien of enemy nationality.