As this verb is defective, and has no inflection to distinguish past from present time, illiterate persons often attempt to supply the deficiency by the use of auxiliaries. Hence the expressions, don't ought, had ought, hadn't ought. Mr. Pegge notices the two last among the vulgarisms of London.
Now, you hadn't ought to be so stingy with such charming daughters as you've got.--Maj. Jones's Courtship, p. 67.
Peter Cram is an impostor and ignoramus, and you hadn't ought to have recommended him.--Knickerbocker Mag., Vol. XVII.
"The luggage must be brought in," said the elderly gentleman. "Yes! I should think it had oughter," observed the young man in reply. "I should bring it in, if it was mine. Mrs. Clavers's Forest Life, Vol. I. p. 96.