| The success of the congregation in Leiden was mixed. Leiden was a thriving industrial center, [13] and many members were well able to support themselves working at Leiden University or in the textile, printing and brewing trades. Others were less able to bring in sufficient income, hampered by their rural backgrounds and the language barrier; for those, accommodations were made on an estate bought by Robinson and three partners. [14]Brewster had been teaching English at the university, and in 1615, Robinson enrolled to pursue his doctorate. There, he participated in a series of debates, particularly regarding the contentious issue of Calvinism versus Arminianism (siding with Calvin). Brewster, in a venture financed by Thomas Brewer, acquired typesetting equipment about 1616 and began publishing the debates through a local press. [15]By 1617, although the congregation was stable and relatively secure, there were ongoing issues that needed to be resolved.Bradford noted that the congregation was aging, compounding the difficulties some had in supporting themselves. Some, having spent through their savings, gave up and returned to England. It was feared that more would follow and that the congregation would become unsustainable. The employment issues made it unattractive for others to come to Leiden, and younger members had begun leaving to find employment and adventure elsewhere. Also compelling was the possibility of missionary work, an opportunity that rarely arose in a Protestant stronghold Pilgrims in Leiden |  |