Definition of "merrily"

So quickly the poore mans ſubſtance is ſpent,But merrily with the world it went,VVhen men eat berries of the hauthorne tree, […] And old men knew not vſurie:Now tis come to a wofull paſſe, […]

1593, anonymous author, The Life and Death of Iacke Straw […], Act I

Ariell:Where the Bee ſucks, there ſuck I,In a Cowslips bell, I lie,There I cowch when Owles doe crie,On the Batts backe I doe flie after Sommer merrily.Merrily, merrily, ſhall I liue nowVnder the bloſſom that hangs on the Bow.

1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene i], page 17

Then Heidi would sit down and chatter merrily away.

1956 , Johanna Spyri, Heidi, translation of original by Eileen Hall, page 50