Related Clues:
- Sermon he broadcast about Biblical quartet
- Apocalyptic figures
- Revelation foursome
- Matthew, Mark, Luke and John
- Matthew, Mark etc
- eg Mark, Luke etc
- John and Luke, for two
- Glib accounts one ignored following travel books
- Writings of the first parts of 21- and 53-Across and 3- and 31-Down
- Steed riders
- Matthew and Mark wrote two of them
- John and Mark, for two
- Church quartet
- Zane Grey posse
- Riders seem to get excited when gathered by huntsman's instrument