The most representative of the early "Manipravalam" works are the tales of courtesans ("Achi Charitams") and the Message Poems ("Sandesa Kavyas"). "Unniyachi Charitam, Unnichiruthevi Charitam" and "Unniyadi Charitam" are examples of the former type which is known by the name "champu". The "Padya" (verse) portion is in Sanskrit metres and the "Gadya" (prose) portion is mostly in Dravidian metres. Authorship of "Unniyachi Charitam" and "Unnichiruthevi Charitam" is not known and only a portion of the works is now available. "Unniyadi Charitam", which also exists in a fragmented form, is supposed to be written by Damodara Chakkiar. The "Sandesa Kavyas" are an important poetic genre in Sanskrit, and on the model of Kalidasa's "Meghadūta" and Lakshmidasa's "Sukasandesa", a number of message poems came to be written first in "Manipravalam" and later in pure Malayalam. The best known among these "sandesas" is perhaps "Unnuneeli Sandesam" written in the 14th century. The poem is written under the pen-name Amruthanilakshi, and some believe that it was written in 1362 CE. The exact identity of the author remains a mystery, but it is widely believed that one of the members of the Travancore Royal Family wrote it.