the damsel Bolina, […] [and] the nymph Arethusa [prayed and] Diana opened a secret passage for her under the earth and sea, […] All which^([sic]) merely means, if we may believe Sir G. Cox, "that she fled to the Dawnland where Eos closes as she begins the day, and where the sun again greets the love whom he has lost."
Source: wiktionary