Possible Clues:

• King Edward on horseback apparently to take flight
• Take off and fly — go off on sortie originally
• Depart quickly
• Kelvin, journalist in charge? Run away!
• Flight requested, not the first to go off
• Being on horse, fly — or flee
• Fly, wingless one infesting animal's back
• After scalping requested, turn to run off
• Push off parasitic fly trapped in part of tack
• Depart hurriedly, finding parasite in joint