Cathay that now they "were" living in the Great Cathay. This all made them quite convinced that Cathay is indeed China. China-based Jesuits promptly informed their colleagues in Goa (Portuguese India) and Europe about their discovery of the Cathay-China identity. This was stated e.g. in a 1602 letter of Ricci's comrade Diego de Pantoja, which was published in Europe along with other Jesuits' letters in 1605. The Jesuits in India, however, were not convinced, because, according to their informants (merchants who visited the Mughal capitals Agra and Lahore), Cathay – a country that could be reached via Kashgar – had a
Cathay his "Book on the Administration of the State", apparently as two separate countries (presumably, referring to the Liao and Song Empires, respectively). The name's currency in the Muslim world survived the replacement of the Khitan Liao dynasty with the Jurchen Jin dynasty in the early 12th century. When describing the fall of the Jin Empire to the Mongols (1234), Persian history described the conquered country as "Khitāy" or "Djerdaj Khitāy" (i.e., "Jurchen Cathay"). The Mongols themselves, in their "Secret History" (13th century) talk of both Khitans and Kara-Khitans. In about 1340 Francesco Balducci Pegolotti, a merchant from Florence, compiled the