The grateful sense I have of your kindness will never be erased from my mind
I take this first opportunity to send you my thanks for——
You have exceedingly obliged me by——
I beg to acknowledge, with thanks, the receipt of——
I am grateful to you for your kind expression of sympathy
Though your kind letter has waited so long for a reply, you may be assured that I was not unmindful of its messages of sympathy
Please accept my warmest thanks for your kindness
I am deeply indebted to you for——
I received your very agreeable letter, and hasten to give you my most hearty thanks for your——
I thank you for your hospitality