Book  (1978)  Page(s) 137.  
 
Even more double [than 'Cinderella'] was  De  Vink's 'Humpty Dumpty'  introduced along with 'Cinderella' by Thomas Robinson in 1952. This is rose pink, has nearly a hundred small petals, and is so short that it looks all flower and no plant. 

Book  (1960)  Page(s) 20.  
 
Humpty Dumpty  A new variety of dwarf habit, bearing clusters of dark carmine-pink flowers of very double form which open to the size of a shilling. The blooms are enhanced by the dark glossy green foliage.

[a shilling is approximately 23mm in diameter.]

Book  (1959)  Page(s) 121.  
 
Humpty Dumpty  A R. polyantha nana hybrid, growing only 6 in. tall and bearing clusters of carmine-pink flowers throughout summer.