Final answer:
Aurel Stein obtained ancient manuscripts and paintings through purchases, donations, and archaeological expeditions in Central Asia.
Step-by-step explanation:
Aurel Stein obtained ancient manuscripts and paintings through various means, including purchases, donations, and archaeological expeditions. He was known for his explorations in Central Asia, particularly in regions such as China, India, and Persia. Stein would often fund his own expeditions and acquire manuscripts and paintings from local sellers, traders, and archaeological sites.