Definition of "eftsoones"

Now ſtands the Brere like a Lord alone, / Puffed up with pryde and vaine pleaſaunce: / But all this glee had no continuaunce. / For eftſoones Winter gan to approche, / The bluſtring Boreas did encroche, / And beate upon the ſolitarie Brere: / For nowe no ſuccour was ſeene him neere.

1579, Immeritô [pseudonym; Edmund Spenser], “Februarie. Aegloga Se[c]unda.”, in The Shepheardes Calender: […], London: […] Hugh Singleton, […]; republished as The Shepheardes Calender […], London: […] Iohn Wolfe for Iohn Harrison the yonger, […], 1586, folio 6, verso