The TYBURN is a six line poem consisting of 2, 2, 2, 2, 9, 9 syllables.
The first four lines rhyme and are all descriptive words. The last two lines rhyme and incorporate the first, second, third, and fourth lines as the 5th through 8th syllables.
More instruction: http://www.wikihow.com/Write-a-Tyburn-Poem
A very merry day, don’t you think?
Warmed by a third cherry, sherry drink
Life’s moments; a rushing, gushing stream
Its mem’ries a blushing, hushing gleam
A challenging form. Yes, the first one 'twists' the rules a little:)