Although there is some dispute about whether the festival of Twelfth Night should be celebrated on the 5th or 6th January, in Algy's world Twelfth Night falls on the 5th, and all Christmas decorations vanish on the following day.
So Algy decided that he would like to see his assistants' Christmas tree one last time before it melted away into the cold mist of January, as he intended to revel in the final mirth and jollity of the festive season, although of course with the intent of parting "from hence, as free from offence, as when ye innocent met here."
And Algy hopes that if you too celebrate this festival with "cakes full of plums" or other delicious treats, and "drink to the base from the brink" – or even indulge in a wee bit of wassailing – you will do the same 😀
With mirth and joliity to you all:
Now, now the mirth comes
With the cake full of plums,
Where bean's the king of the sport here ;
Beside we must know,
The pea also
Must revel, as queen, in the court here.
Begin then to choose,
This night as ye use,
Who shall for the present delight here,
Be a king by the lot,
And who shall not
Be Twelfth-day queen for the night here.
Which known, let us make
Joy-sops with the cake ;
And let not a man then be seen here,
Who unurg'd will not drink
To the base from the brink
A health to the king and queen here.
Next crown a bowl full
With gentle lamb's wool :
Add sugar, nutmeg, and ginger,
With store of ale too ;
And thus ye must do
To make the wassail a swinger.
Give then to the king
And queen wassailing :
And though with ale ye be whet here,
Yet part from hence
As free from offence
As when ye innocent met here.
[Algy is quoting the poem Twelfth Night, or King and Queen, by the 17th century English poet Robert Herrick.]
Footnote to explain the poem: A popular Twelfth Night tradition was to have a bean and pea hidden inside a Twelfth-night cake. The man who finds the bean in his slice of cake becomes King for the night while the lady who finds a pea in her slice of cake becomes Queen for the night. Following this selection of King and Queen, Twelfth Night parties would continue and would include the singing of Christmas carols, as well as feasting.