but its lack could not be explained in the mortal world. Miralys either had to wear something or not take part in Denoriel's venture. That would mean Denoriel would have had to ride a real horse. Everyone, especially Miralys, considered that too dangerous, not so much because Denoriel would be unable to manage a stupid, mortal beast, but because he might forget he was riding one and expect from it things Miralys would do.
Actually Denoriel was rather grateful to Norfolk's groom because his innocent remarks confirmed the reason for one of Denoriel's peculiarities—unsaddling and grooming his own horse. It had rather horrified George Boleyn and his friends that Lord Denno would stoop to groom's work. They had been