Definition of "heartly"

' […] I wish you very good fortune.' He found a card of his own. 'If I can be of any help to you' His hand was gripped. 'Very kind indeed. My heartliest thanks.' The man bowed and strode off into the mist.

1926, Sir Hugh Walpole, Harmer John: an unworldly story

He said the sword was a “heartly present” because it had been hand-made by its donor.

2001, Charles Neider, Edge of the World

Great scarcity of every necessary of life in this house but the man is glad to see us, and gives us the best he has got with a heartly welcome.

2009, Harold B. Gill Jr., George M. Curtis III, A Man Apart: The Journal of Nicholas Cresswell, 1774 - 1781

“Heartly,” he said—they celebrated in a heartly way,” and two days later now, I can't even remember the Hindi word, but the concept remains, and how am I going to give this up?

2009, Katherine Russell Rich, Dreaming in Hindi

Out of the largest and deepest well of everlasting life in the most open wound in Christ's blessed side seize up deepest and heartliest water of joy and bliss without end, beholding there inwardly how Christ Jesu, God and man, to bring thee to everlasting life, […]

2012, Andrew Burnham, Aidan Nichols, Customary of Our Lady of Walsingham