The purpose of a letter of attestation is to confirm or acknowledge an action, statement or behavior. As such, it takes the format and layout of an official letter, but with a few modifications. Basically, the sender is attesting to the knowledge and awareness of a particular situation.
Some consider L.rubellus to be the true red worm. It is also called the dung worm, or red marsh worm. This worm loves manure and compost piles but has also been found working the earth which makes it doubly effective as the two other worm varieties stay mostly at the surface of the soil.
The fastest composting occurs in compost tumblers and hot piles, set up to promote heat-creating bacteria to break down the compost. (See References 2, Fast Compost) Worm bins yield finished worm manure or vermicompost in two to three months (see References 3, page 6). An outdoor heap consisting mainly of oak leaves may take 18 months (see References 4, page 37).