Feeling the call to preach he met a group of former Baptists, and together they called themselves "The Children of Light". Over the years, moving from the English Midlands into Yorkshire, Fox was accepted by a group of Seekers. As time went on they began to refer to themselves as "Friends in the Truth", and it is this that gives us the official name of the "Religious Society of Friends". The term "Quakers", which sometimes appears in brackets after the official name, comes from an insult used by a magistrate in Derby when he was sentencing some Friends for being non-conformist (Fox had bidden him to "tremble at the word of the Lord").