The keen personal interest of Hartlib in the work of Comenius had important temporary consequences on the direction of the reformer’s activities during the next few years. Hartlib at this time was the most interesting figure in English educational history. “Everybody knew him,” says Professor Masson.[16] “He was a foreigner by birth, being the son of a Polish merchant who had left Poland when the country fell under Jesuit rule, and had settled in Elbing in Prussia, in very good circumstances. Twice married before to Polish ladies, this merchant had married in Prussia for his third wife the daughter of a wealthy English merchant at Dantzig; and thus our Hartlib, their son, though Prussian born and with Polish connections, could reckon himself half English. The date of his birth was probably about the beginning of the century. He appears to have first visited England in or about 1628, and from that time, though he made frequent journeys to the continent, London had been his headquarters. Here, with a residence in the city, he carried on business as a merchant, with extensive foreign correspondence, and very respectable family connections. But it did not require such family connections to make Hartlib at home in English society. The character of the man would have made him at home anywhere. He was one of those persons now styled philanthropists, or friends of progress, who take an interest in every question or project of their time promising social improvement, have always some irons in the fire, are constantly forming committees, or writing letters to persons of influence, and live altogether for the public. By the common consent of all who have explored the intellectual and social history of England in the seventeenth century, he is one of the most interesting and memorable figures of that whole period. He is interesting both for what he did himself and on account of the number and intimacy of his contacts with other interesting people.”