What did Charles Spurgeon primarily use to fund the pastoral college he started?

Charles Spurgeon primarily used the sale of his sermons to fund the pastoral college he started, known as the Pastors' College. Spurgeon's sermons were widely published and sold, generating significant income that he directed toward the establishment and maintenance of the college. His prolific output and the popularity of his preaching allowed him to create a sustainable financial model for training future pastors, which was a key aspect of his ministry.

The other options, while they may include relevant sources of funding or support, did not play the central role that the sale of his sermons did in financing the college. Donations from church members could supplement funds, and book sales in America might contribute to his income, but the direct and substantial financial backing for the college came primarily from the sale of his own preachings. Government grants were not a typical source of funding for such institutions at that time, particularly in a religious context.