Quickly and deftly (быстро и ловко) he went once more (он еще раз обыскал; to go (went, gone) through smth. — тщательно разбирать что-либо; обыскивать, обшаривать что-либо) through the pockets of the dead man’s clothes (карманы одежды убитого мужчины) but found nothing there of interest (но не нашел там ничего интересного; to find (found)). He tried the communicating door (он попробовал смежную дверь; to try — пытаться, стараться; проверять на опыте; try the door — попробуйте /заперта ли/ дверь) which led through to the next compartment (которая вела в соседнее купе; to lead (led); next — следующий; ближайший, соседний), but it was bolted on the other side (но она была заперта на засов изнутри: «с другой стороны»; bolt — засов, задвижка; to bolt — запирать на засов).

communicative [k'mju:nktv] presently ['prezntl] quickly ['kwkl] deftly ['deftl]

Further than that Poirot was not disposed to be communicative. He looked round him as he went on:

“We will go into all that presently. Let us first make sure that we have seen all there is to be seen here.”

Quickly and deftly he went once more through the pockets of the dead man’s clothes but found nothing there of interest. He tried the communicating door which led through to the next compartment, but it was bolted on the other side.

“There is one thing (есть одна вещь) that I do not understand (которую я не понимаю),” said Dr. Constantine. “If the murderer did not escape through the window (если убийца не сбежал через окно), and if this communicating door was bolted (и если смежная дверь была заперта) on the other side (с другой стороны), and if the door into the corridor (и если дверь в коридор) was not only locked on the inside (была не только заперта на замок изнутри; lock — замок, затвор; to lock — запирать на замок; inside — внутрь, внутри) but chained (но и закрыта на цепочку; chain — цепь, цепочка; to chain — скреплять цепью; закрыть на цепочку /дверь/), how then did the murderer (как же тогда убийца) leave the compartment (покинул купе)?”

“That is what the audience says (как раз это и говорит публика/зрители) when a person bound hand and foot (когда человека, связанного по рукам и ногам; to bind (bound) — вязать, связывать) is shut into a cabinet (запирают в ящик; cabinet — горка, шкафчик; футляр, ящик) — and disappears (и /он/ исчезает).”

bolt [blt] chain [ten] audience [':dns] cabinet ['kaebnt] disappear [ds'p]

“There is one thing that I do not understand,” said Dr. Constantine. “If the murderer did not escape through the window, and if this communicating door was bolted on the other side, and if the door into the corridor was not only locked on the inside but chained, how then did the murderer leave the compartment?”

“That is what the audience says when a person bound hand and foot is shut into a cabinet — and disappears.”

“You mean (то есть…) — ?”