Oh mother of sleep 
                       In my dreams your serenity to reap,  
                          You drain the colours of my day 
                      To dissolve away that blue dismay,  
                          Without a trace of cloudy grey,  
                                  Oh mother of sleep  
                                Your serenity to keep.
Ken e Hall
http://www.poemhunter.com/poem/serenity-of-sleep/