The [first stage of the trip to Marburg for the Colloquy with Luther was the] journey to Basel [which] was made on horseback, the distance from Zurich being about sixty miles, and Zwingli and his friend arrived there safely, September 5. Thence, in company with Œcolampadius and others, he proceeded by boat to Strasburg, where he arrived the next day, September 6. Here he tarried eleven days to confer with his friends and lay plans for the coming conference and also to await the arrival of Ulrich Funk, Zurich’s official delegate. Leaving Strasburg September 18, the company, consisting of Zwingli, Collin, and Funk, of Zurich; Œcolampadius, of Basel; Butzer and Hedio, of Strasburg; and delegates of the last named cities, was conducted overland by a strong escort of Hessian cavalry, through dense forests and dangerous mountain passes, to Marburg, where they arrived September 27. Luther, in company with his Wittenberg friends, Philip Melanchthon, Caspar Cruciger, and Justus Jonas, entered the city the day following.*
*Samuel Simpson, Life of Ulrich Zwingli: The Swiss Patriot and Reformer (New York: Baker & Taylor Co., 1902), 187–188.