But declared (alla apēggellon). Imperfect active of apaggellō, repeatedly.
Throughout all the country of Judea (pāsan te tēn chōran tēs Ioudaias). The accusative here in the midst of the datives (tois en Damaskōi, Ierosolumois, tois ethnesin) seems strange and Page feels certain that eis should be here even though absent in Aleph A B. But the accusative of extent of space will explain it (Robertson, Grammar, p. 469).
Doing works worthy of repentance (axia tēs metanoias erga prassontas). Accusative case of present active participle prassontas because of the implied autous with the present infinitive metanoein (repent) and epistrephein (turn), though the dative prassousin could have been used to agree with ethnesin (Gentiles). Cf. Mat 3:8 for similar language used of the Baptist. Paul, the greatest of theologians, was an interesting practical preacher.