|'Phags-pa script||ꡏꡡꡃ ꡣꡡꡙ ꡐꡜꡞ ꡝꡧꡞꡋ| Menggu Ziyun (Chinese:
蒙古字韻, "Rimes in Mongol Script") is a 14th century rime
dictionary of Chinese as written in the 'Phags-pa script that
was used during the Yuan Dynasty (1271–1368). The only surviving
examplar of this dictionary is an 18th century manuscript copy
that belonged to Stephen Wootton Bushell (1844–1908), and is now
held at the British Library (Or. 6972). As the only known
example of a 'Phags-pa script dictionary of Chinese, it is
important both as an aid for interpreting Yuan dynasty texts and
inscriptions written in Chinese using the 'Phags-pa script, and
as a source for the reconstructed pronunciation of Old Mandarin.
The British Library manuscript  The British Library manuscript
was acquired by the antiquarian and art historian S. W. Bushell
when he worked as a physician at the British Legation in
Beijing, China from 1868 to 1900, probably in 1872 during a trip
to Inner Mongolia and the ruins of Xanadu, the fabled summer
capital of the Yuan emperors. In