The Gospel writers recorded the events of Christ's death and resurrection from various points of view. Putting them together gives a fuller picture. For example, which women went to the tomb?

"Apparently Mary Magdalene, Mary the mother of James, Salome, Joanna, and 'the other women from Galilee' (Luke 23:55). John singles out Mary Magdalene for mention (20:1) presumably because it was she who brought information back to Peter and the other disciples: she herself implies in 20:2 that there were others with her—we do not know. So the writers could each be mentioning by name those of the party whose behaviour made an impact on those from whom the writers gained their information." (Eerdmans' Handbook to the Bible, page 530.)