- NLW MS 8426B.
- File
- [1801x1920].
Part of Neuadd Wen Manuscripts,
Two notebooks containing a description by 'Watkin ap Mair Gwilym' of a system of arithmetic based on the dozen with a new terminology in Welsh, and exercises in arithmetic.
Part of Neuadd Wen Manuscripts,
Two notebooks containing a description by 'Watkin ap Mair Gwilym' of a system of arithmetic based on the dozen with a new terminology in Welsh, and exercises in arithmetic.