See the notes at Matthew 3:3, Matthew 3:5-6, Matthew 3:11.
Related Commentaries of Mark 1:4
Mark 1:4-8
4 John did baptize in the wilderness, and preach the baptism of repentance fora the remission of sins.
5 And there went out unto him all the land of Judaea, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins.
6 And John was clothed with camel's hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey;
7 And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose.
8 I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.