Note 51 — APPENDIX TO CHAPTER XVI.
Reading edition
The estimate for 1839 is founded on the ascertained number of letters for one week in the month of November, and strictly speaking it is for the year ending December 5th, at which time 4d. was made the maximum rate. The estimate for each subsequent year is founded on the ascertained number of letters for one week in each calendar month (vide Return to the House of Commons, No. 586, 1847).