As to the numbers who flocked to hear some of his addresses they can best be realised by those who have attended an international football match, when 20,000 persons are actually assembled in one field, or at a review, when a like number of people are together. It seems impossible to realise that one voice could reach such a multitude; yet it is a fact that some of John Wesley's open-air congregations consisted of over 20,000 persons.