At last, in July 1534, the six youths were permitted to know each other as comrades in arms. It was time to discuss what form their crusade should take, and Ignatius proposed that, after a week or two of increased austerity and prayer, they should make the vow of self-dedication and decide upon their future. There is the characteristic impress of Ignatius on every feature of the enterprise. The ceremony was not to be in one of the churches of Paris, but away across the meadows in the quiet little chapel of St. Denis on Montmartre; in fact, in the crypt underneath the chapel. And on August 15th they went out from the city gates in the early morning for what proved to be the historic foundation of the Society of Jesus. Paris was still, at that time, a comparatively narrow strip of town on either bank of the Seine centring upon the island which bore the cathedral and the palace. A mile or two of meadows and vineyards lay between it and the green hill of Montmartre, on the slope of which was the old chapel of St. Denis. Underneath the choir was a small vault-like chapel, and in this, on the Feast of the Assumption of the Virgin, the little band of fervent southerners gathered to hear Peter Favre, the only priest amongst them, say the Mass of the Virgin. At its close they knelt in turns before the altar, and each vowed that he would live in poverty and chastity, and either go out to convert the Turks or go wherever the Pope should direct. No rumbling of angry devils was heard on this occasion: the life of Paris flowed on its sparkling way; yet there was born in that dim vault on that August morning one of the most singular and formidable forces in the religious life of Europe.