During an 1898 Warsaw visit, Curtin began translating Prus' "Pharaoh". Polish friends had urged him to translate it, and he had himself found it "a powerful novel, well conceived and skillfully executed"; he declared its author a "deep and independent thinker." In September 1899, again in Warsaw—where, as often happened, Sienkiewicz was away—Curtin went ahead with his translation of Prus' historical novel. Wolff urged him to continue with Prus, calling him profounder than Sienkiewicz. During another Warsaw visit, in early 1900, while again waiting for Sienkiewicz to return from abroad, Curtin called on Prus.