Ref:
The English or Shakespearean sonnet, developed first by Henry
Howard, Earl of Surrey (1517-1547), consists of three quatrains and
a couplet--that is, it rhymes abab cdcd efef gg.
from
http://www.utm.edu/departments/english/everett/sonnet.htm
I find the sonnet to be a very strict form, not least because of
its rhyme scheme but also due to the use of the iambic
pentameter.
Regardless, it's a good effort. Very creepy!
