| Not exceeding ½ ounce (uniform rate irrespective of distance of transmission). | 1d. |
| Not exceeding 1 ounce (uniform rate irrespective of distance of transmission). | 2d. |
| For each additional ounce, or fraction of an ounce, 2d. |
1865.
Rate for letters exceeding 1 ounce in weight reduced to 1d. for each ½ ounce, or fraction of ½ ounce, after the first ounce.
1871.
| Not exceeding 1 ounce | 1d. |
| Not exceeding 2 ounces | 1½d. |
| For every additional 2 ounces or fraction of 2 ounces up to 12 ounces, ½d. |
| For letters exceeding 12 ounces in weight, 1d. per ounce, including the first ounce. |
1885.
Rate of ½d. per ounce after the second ounce continued without limit.
1897.
| Not exceeding 4 ounces | 1d. |
| For every 2 ounces, or fraction of 2 ounces, thereafter, ½d. |