The post you are reporting:
The EAGLE GARDENS, in the past, appears to have been a popular place for masquerades (masked soirees?). Here is a report of one:
Masquerade at the Eagle Gardens:
Betsy NASH, singlewoman, attired in male apparel, charged with creating a disturbance at the Royal Mortar. No one appearing against the defendant it was stated she had been to a Masquerade in the Eagle Gardens and appeared before the bench in her dress as "a nice young man"; was dismissed with a caution not to again appear in such unsuitable attire! (Dover Telegraph Sat.1.1.1848 p.8 col.1)
[ Betsy Nash, who made regular appearances in the Dover Police Court for stealing appears to have caused quite a stir in her male attire! ]
and report of another masquerade (NOT at the Eagle) 45 years earlier...
The Masquerade on Thursday night suffered a considerable drawback on the amusement which SOME OF ITS ATTENDANTS had promised to themselves by the absence of a soldier of the 4th Regiment, William COUSE, who was taken in the act of dressing in woman's attire for the Opera House and carried before Sir Richard FORD on a charge of felony, by whom he was committed to the House of Correction. It appears this fellow has been in the constant habit, with several associates of a similar description, of attending masquerades in the dress of women. (Kentish Gazette 2 Mar 1802 back page col.3 near the bottom)
K.