English Language · English Literature

In Edwin Arlington Robinson's poem 'Richard Cory', the line 'And he was always quietly arrayed, / And he was always human when he talked' is followed by 'But still he fluttered pulses when he said, / 'Good-morning,' and he glittered when he walked.' What figure of speech is primarily used in 'he glittered when he walked' to describe his exceptional aura without using 'like' or 'as'?