договорившись со своим украинским коллегой об обмене коллекциями пернатых, ростовчанин отправил украинцу своих птиц, оформив их, как того требует закон.
having agreed with his Ukrainian counterpart on exchanging collections of birds, the Rostov resident sent throughout their birds, skinning them, as required by law.
agreeing with his Ukrainian counterpart on the exchange of collections of birds, rostovchanin sent Ukrainians their birds, drawing them, as required by law.