を持っていった

took … away; took … along

→ を
phrase Rare #24,855
took … away; took … along を marks the thing being taken. 持っていった can mean taking something away or bringing it along to another place.
JA: 旅行に傘を持っていった。
EN: I took an umbrella along on the trip.

道に迷うといけないので私たちは地図を持っていった。

We brought a map so we wouldn’t get lost.

誰かが僕の鉛筆を持っていった。

Someone took my pencil.

カメラを持っていった。

I took my camera with me.

誰かが間違ってそのお金を持っていったのは明白だった。

It was obvious that someone had taken the money by mistake.