Way of Seekers Department of Tarbiyat, Ahmadiyya Muslim Jamaat, Canada
A Letter to a Dear One is a book written by Hazrat Chaudhry Sir Zafrulla Khan sahib (May Allah be pleased with him) at the occasion of the marriage of and for his Private Secretary.
The original book can be accessed here: http://www.alislam.org/library/books/lettertoadearone/LettertoaDearOne.pdf