In Doré's illustration, the detail that is not found in Dante's poem is:
OB. The demons threatening Virgil and Dante with their pitchforks
In Dante's poem, "Inferno," there is a scene where Virgil and Dante encounter demons with their prongs aimed at Virgil, but there is no specific mention of the demons threatening Virgil and Dante with their pitchforks. This added detail of the demons actively threatening them with pitchforks is not directly described in Dante's original text. This artistic interpretation by Doré adds a sense of immediate danger and intensifies the menacing atmosphere of the scene beyond what is explicitly stated in the poem.
