| The mutations seem to have started in the second half of the 6th century in the case of the tenues. |
| The same remark holds good in the case of the nasal mutation of the tenues. |
| It is not until much later times that the h in the mutated forms of the tenues, or the use of the dot, was extended to the mediae. |
| As a rule the medial mutation of the tenues and mediae is not denoted in O. Welsh. |
