When they had kindled a fire (periapsantwn pur). Genitive absolute, first aorist active participle of periaptw, an old verb, but here only in the N.T. Kindle around, make a good fire that blazes all over. It was April and cool at night. The servants made the fire. And had sat down together (kai sunkaqisantwn). Genitive absolute again. Note sun- (together), all had taken seats around the fire. Peter sat in the midst of them (ekaqhto o Petro meso autwn). Imperfect tense, he was sitting, and note meso, nominative predicate adjective with the genitive, like John 1:26 , good Greek idiom.