The letter to the older sister describes impressions of New Orleans, people's suffering, and the meaningful work involved in volunteering at Dr. Becky Turner's travelling bus clinic.
Impressions of New Orleans: New Orleans is a Southern city known for various vices and diverse spiritual practices, including prostitution and gambling.
Suffering of the people: The people you have met are described to be undergoing challenging circumstances and facing hardships.
Worthwhile work: The worthwhile work involves volunteering with Dr. Becky Turner's travelling bus clinic, providing essential medical assistance to those in need.
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