Similarly documented with meticulous detail are the other books on the Republic, which tend to be quite controversial. These works directly and confrontationally challenge the monarchist positions that predominantly remained among supporters of Salazarism, who had a platform in the Catholic newspaper Novidades [News] . CF did not shy away from dismantling falsehoods and lies regarding the regicide, allowances to the Royal Household, King Carlos’s diplomacy, education reforms, the defence of overseas territories, and many other aspects. His work is undeniably that of a committed republican, without any pretence of neutrality — which would be insincere on his part — but rather a well-researched and thoroughly documented exposé. This work remains unchallenged, supported by undisputed witnesses, although it naturally displeases those with more or less covertly antagonistic ideological positions.

Even at the end of a busy career, he authored a brief História da República , published by Terra Livre in 1976, followed by a well-informed edition and annotation of the Memórias [Memoirs] by José Relvas. A meritorious compilation of the Relatórios sobre a Revolução de 5 de Outubro [Reports on the Revolution of 5 October] was also owed to him; it was published by the Lisbon City Council in 1978 and warranted revision and expansion during the centenary celebrations in 2010. Throughout his life, he amassed an impressive library of 26,000 volumes on contemporary history, particularly focusing on the First Republic, which he sold to the State for a nominal sum in 1976. This invaluable collection is housed at the Museu da República e da Resistência [Museum of the Republic and Resistance] in Lisbon, known as the Biblioteca Dulce Ferrão [Dulce Ferrão Library].

Active bibliography: Assim estalou a guerra . Lisbon: Parceria A. M. Pereira, 1940 [2nd ed., 1942]; Seis meses de guerra , Lisboa, Livraria Portugália, 1940; Churchill , Lisbon, Parceria A. M. Pereira, 1940; ABC da política mundial , Lisbon, Livraria Sá da Costa, 1941; Os americanos no Norte de África , Lisbon, O Século, 1943; A Itália capitulou? , Lisboa, O Século, 1944; A conferência de Moscovo: seus antecedentes e suas consequências , Lisbon, Parceria A. M. Pereira, 1944; Como a Alemanha perdeu a guerra , Lisbon, O Século, 1945; O drama de Nuremberg , Lisbon, O Século, 1946; História da Guerra 1939-1945 , organised by Carlos Ferrão, Lisbon, Editorial O Século, [194?]; História secreta da guerra. Lisbon, O Século, 12 vols. [1949-1955?]; 50 anos da história do mundo: 1900-1950 , Lisbon, O Século, 1952; História da República , Lisbon, O Século, 1960; Em defesa da verdade . O regicídio, os adiantamentos, a diplomacia de D. Carlos , Lisbon, O Século, 1961; Em defesa da República , Lisbon, Inquérito, [1963]; O integralismo e a República , 1st and 2nd vols., Lisbon, Inquérito, [1964]; 3rd vol. Lisbon, O Século, [1965]; A obra da República , Lisbon, O Século, [1966]; Desfazendo mentiras e calúnias , Lisbon, O Século, [1967]; História da República . Lisbon, Terra Livre, 1976; Memórias políticas de José Relvas , pref. João Medina, ed. Carlos Ferrão, Lisbon, Terra Livre, 1977; Relatórios sobre a Revolução de 5 de Outubro , pref. and notes, Lisbon, City ​​Council, 1978 [2nd ed. 2010].

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