All the mock eclogues (written, like most of Montagu's more ambitious poetry, in heroic couplets with the occasional triplet) target actual individuals and refer to events which were gossip of the day. Monday, Wednesday...
EG
was already rumoured to be engaged to her cousin the Marquess of Lorne
, heir to her uncle the Duke of Argyll
; Lorne, like her, was not yet twenty.