• 17.048 These were the swiftest wolf-riders,

This word is attested in OED as found in:

“Belsta, and Heidr, and Hulla..the wolf-riders.”  Edward George Earle Lytton Bulwer-Lytton · Harold, the last of the Saxon kings · 1st edition, 1848 (3 vols.).  London

Spactacular!  The “wolf” entry in the OED is another one that can keep me occupied for great lengths of time.

“wolf, n.” OED Online, Oxford University Press, June 2017, http://www.oed.com/view/Entry/229845. Accessed 21 September 2017.