Fr Nascimento Mascarenhas wrote his first book, Proclaimers of God’s Kingdom – From Goa to Lisboa, Lives of Priests from Goa Archdiocese but living in Portugal, in 2001. Since then he has authored 10 books, and has continued with the same fervour completing this edition of Unum Presbyterium (One Priesthood), which lists Diocesan priests from Ilhas (Tiswadi). The first installment of this series, published in 2014, listed Diocesan priests from the Bardez taluka.
Now seventy-five, Fr Mascarenhas has made a herculean task look very easy. He has been successfully writing for the last 15 years, which is praiseworthy given that he has not kept well recently. His penchant for reading and love for history has inspired within him the determination to complete a gigantic work such as this. Each of his books is a veritable storehouse of information, and of much importance to anyone interested in the secular and church history of Goa.