Definition of "piller"

Thenne he horsed his bretheren ageyne and sayd bretheren ye oughte to be ashamed to falle so of your horses / What is a Knyght but whan he is on horsbak / I sett not by a knyght whanne he is on foote / for all batails on fote ar but pelowres batails / For there shold no Knyghte syghte on foote / but yf hit were for treason / or els he were dryuen therto by force(please add an English translation of this quotation)

1485, Sir Thomas Malory, “xlviij”, in Le Morte Darthur, book X

"What are you layin' on your good bed in the daytime for, messin' up the feathers, and dirtyin' the pillers with your dusty boots?"

1903, Kate Douglas Wiggin, Rebecca of Sunnybrook Farm