Note 17 — COURT LADIES OF OLD JAPAN
Annie Shepley Omori translation
In the Isé-monogatari (a book of Narihira's poetical works) the Sumida River is said to be on the boundary between Musashi and Shimofusa. So the italicized words seem to be the authoress's mistake, or more probably an insertion by a later smatterer of literary knowledge who inherited the manuscript.
Narihira's poem is addressed to a sea-gull called Miyakodori, which literally means bird of the capital. Narihira had abandoned Kioto and was wandering towards the East. Just then his heart had been yearning after the Royal City and also after his wife, and that feeling must have been intensified by the name of the bird. (Cf. The Isé-monogatari, Section 9.)
Miyakodori! alas, that word Fills my heart again with longing, Even you I ask, O bird, Does she still live, my beloved?