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 large Christian population, while the Jesuits in China had not found any Christians there.