1822,Charles and Mary Lamb,The Works of Charles and Mary Lamb (Vol. 6):
Emma is looking weller and handsomer (as you say) than ever.
1913,Henry Sydnor Harrison,V. V.'s Eyes:
He forgot the Huns; forgot John the Baptist; forgot even his sick, till one of the weller of them (as we may assume) knocked memorially upon his door....
1922,Samuel Hopkins Adams,From a Bench in Our Square:
Now we come home he is already weller.
1934, P. L. Travers, Mary Poppins
“I’m not ill. I’m weller than you,” said Michael rudely.