Who was john cotton speaking to in this sermon?

John Cotton has written:

'The ministers of Christ should be speedy and earnest in speaking to young people'

'Two sermons preach'd at Dorchester, on the Lord's-Day, April, 9, 1727'

'An earnest exhortation to seek the Lord while he may be found, and to call upon him while he is near' -- subject(s): American Sermons, Christianity, Congregational churches, Conversion, Sermons, Sermons, American

'God's awful determination against a people, that will not obey his voice, by his Word, and judgments' -- subject(s): Earthquake, 1727, Earthquakes, Religious interpretations