The details of the visit of Peter and John (John 20:3-10) are peculiar to this Gospel. St. Luke mentions the visit of Peter only (24:12, but comp. John 20:23); but here we have the whole scene pictured with all the vividness and exactness of one who stated what he himself saw and took part in.
Peter therefore went forth, and... came to the sepulchre. — In the original there is a change of tense here; the latter verb expressing the continuance of the journey towards the sepulchre.