Among the greatest influences brought to bear upon him were those of the company of good friends, for he was a man of most sociable disposition. In after days he often spoke of the influence of that devoted man of God, William C. Burns, who went as a missionary to China. This remarkable man was a nephew of Dr. Robert Burns, of whom we shall speak more fully, and a friend of Robert Murray McCheyne, one of the most spiritual of the young preachers of his time. Many a story is yet told of the remarkable sayings and doings of William C. Burns during his memorable visit in Canada. His influence, though that of a passing visitor, was very great over the students of Knox College, and over young Black in particular.
At the end of his second year in Knox College the young student was sent as a missionary to preach the Gospel in a number of new settlements. The townships of Brock, Reach, Uxbridge, and Scott were then filling up with immigrants from Great Britain and Ireland. John Black thus writes to his brother:
"I came here about five weeks ago, and have been very busy ever since. I have four preaching stations, two here and two in the next township south. I preach in three schoolhouses and a large barn. The people are mostly Scotch, Irish, and English. The four would make a decent congregation. I take them two each Sabbath, and have prayer-meetings, when I can manage it, as well as week-day 'preachings.' To-morrow night I must ride six miles northwest to hold a meeting among some English people (whom I like best of all my people), and next day, Friday, come back ten miles to a prayer-meeting in another place, Saturday ten miles again to another, and Sabbath two meetings."
This shows the spirit of the man whose faithful and unremitting services in after years told so powerfully on the banks of the Red River.
As John Black drew to the end of his college course the work of the ministry became very real to him. His sympathies became more intense in his desire to reach and rescue perishing men. The little band of students in 1846 were all aglow with missionary zeal. The Knox College Missionary Society, which has ever since been so good a training school for young missionaries, was formed in that early time. The society at that date not only did city mission work in Toronto and cultivated the missionary spirit, but helped the Missionary Society of the Free Church of Scotland to support a missionary in a foreign land. During the session of 1846-7 the Rev. Mr. Doudiet, a Swiss Protestant missionary, in the service of the French-Canadian Missionary Society, visited Knox College and addressed the students. The students decided to assist this movement. John Black had, as we have seen, some knowledge of French, and was therefore urged by his fellow-students to enter upon this work. He would have preferred preaching in English, for he had enjoyed his summer in the mission field very greatly, but it was agreed that he should spend the following summer at Pointe aux Trembles, a French school near Montreal, ever since well known. This he did, and returned in the autumn to take his last year in college.