You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Plymouth

Context:
A regular international ferry service provided by Brittany Ferries operates from Millbay taking cars and foot passengers directly to France (Roscoff) and Spain (Santander) on the three ferries, MV Armorique, MV Bretagne and MV Pont-Aven. There is a passenger ferry between Stonehouse and the Cornish hamlet of Cremyll, which is believed to have operated continuously since 1204. There is also a pedestrian ferry from the Mayflower Steps to Mount Batten, and an alternative to using the Tamar Bridge via the Torpoint Ferry (vehicle and pedestrian) across the River Tamar.

Question:
When did the Cremyll-Stonehouse ferry first operate?

1204