Definition of "rhapsodical"

And what mean these outbursts and objurgations of his, you will ask; these suggestions, furtive, rhapsodical, mystical; this furibund allegro about Money, Mediums, and Bohemia; [...]

1910 January 12, Ameen Rihani, “Subtranscendental”, in The Book of Khalid, New York, N.Y.: Dodd, Mead and Company, published October 1911, book the second (In the Temple), page 116