Santarém's best and most detailed biographer is undoubtedly Jordão A. de FreitasDe Freitas (Jordão A.), O 2o Visconde de Santarem e os seus Atlas Geographicos, Lisboa, 1909 whose book, however, is written in Portuguese and therefore rather difficult to access . The same disadvantage applies to the chapter devoted to Santarém by Armando Cortesão in his work on Portuguese cartographers and cartography.Cortesão, 1935, vol. II, pp. 365–404 In the latter's 'History of Portuguese Cartography written in English, however, an excellent account is given of Santarem's life and work.Cortesão, 1969, vol. I, pp. 7–34. The short biographical note given here is largely based on this text.
