asked the Postmaster-General whether he can give, approximately, the number of pillar-boxes throughout the country and whether he will consider the advisability of letting them for advertising purposes as a means of revenue?

The number of pillar-boxes throughout the country is about 12,000. The possibility of using them for advertising purposes has been considered many times, and has quite recently been under review. The proposal is open, however, to substantial objections, and I do not propose to pursue it.