Nanjing dialect
The "English &amp; Chinese vocabulary in the court dialect" by Samuel Wells Williams was based on the Nanjing dialect, rather than the Beijing dialect. Williams also described the differences between Nanjing and Beijing Mandarin in the same book and noted the ways in which the Peking dialect differs from the Nanjing dialect, such as the palatalization of velars before front vowels. Williams also noted that the changes were consistent so that switching between pronunciations would not be difficult.