original: Telephone cables ran through the tunnels, down the cliff and under the harbour to batteries on the other side.
simplifications: Telephone cables ran through the tunnels, down the cliff and under the harbour to batteries. Telephone cables ran through the tunnels, down the cliff. After that they go under the harbour to batteries on the other side. Telephone cables ran through the tunnels and under the harbor to batteries on the other side. Telephone cables ran through the tunnels. They ran down the cliff and under the harbor. They ended at batteries on the other side. Telephone cables ran through the tunnels and down the cliff. They then ran under the harbour to batteries on the other side. Telephone cables ran through the tunnels, down the cliff and under the harbour. The go to batteries on the other side. Telephone cables ran to batteries on the other side of the harbour. Telephone cables ran from batteries on one side, under the harbor, up the cliff, and through tunnels. Telephone cables ran through the tunnels, down the cliff and under the harbour to batteries on the other side. Telephone cables were present in the tunnels, the cliff and under the harbour to batteries on the other side.