Final answer:
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.
Explanation:
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.
Learn more about writing a persuasive letter to invite someone to join in volunteer work here:
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