@article{oai:kansaigaidai.repo.nii.ac.jp:00008021,
 author = {中村, 不二夫 and Nakamura, Fujio},
 journal = {研究論集, Journal of Inquiry and Research},
 month = {Sep},
 note = {論文, ARTICLE, In Present-day English, the number twenty-one is expressed ordinally as twenty-first. In the past, however, English had a different numerical system. The OED², for example, refers to one-and-twentieth and twenty-first as ordinals. Surprisingly, the history of ordinal numerals seems to have escaped grammarians’ attention. This is perhaps because of the scarcity of historical data. This paper attempts to elucidate the ways in which ordinal numerals from 21 to 99 have been expressed since the mid-fourteenth century.
An examination of electronic corpora utilized British and American English texts consisting respectively of 325 and 410 different documents which were written mostly during 1351-1950 and 1750-1950. Furthermore, eight more sorts of corpora were analysed. Historical variants for the spelling of ordinal numerals were included in the analysis of these corpora; for example, 15 alphabetic forms including tuentipe, twentythe, twentith, twenteth and tuentiand stood for twentieth.
Evidence shows that, in British English, the form of twenty-first began to multiply around 1650, and took precedence over the other morphological variants not later than 1700. Accordingly, American English has maintained the higher percentage exclusively of the form of twenty-first since the founding of the United States.},
 pages = {21--38},
 title = {Ways of Expressing Ordinal Numerals in the History of English : From One and Twentieth to Twenty-First},
 volume = {114},
 year = {2021},
 yomi = {ナカムラ, フジオ}
}