Noun
slumberland (uncountable)
An imaginary place inhabited by those who are asleep; (by extension) the state of slumber.
He began Little Nemo in Slumberland afresh that August 3.sfn The new strip displayed the virtuoso technique of the old, but the panels were laid out in an unvarying grid. Source: Internet
Its printing staff used the Ben Day process for color.sfn Publication history Little Nemo in Slumberland debuted on the last page of the Sunday comics section of The New York Herald on October 15, 1905. Source: Internet
On July 12, 1908, McCay made a major change of direction: Flip visits Nemo and tells him that he has had his uncle destroy Slumberland. Source: Internet