In our fourth, multi-choice pop quiz on Newport Beach history, find out:

• Why you would find horses on the beach at between the the late 19th Century and the 1930s.
• What was the castle on Collins Island converted to in the 1940s.
• Who were the previous tenants of the Mariners Mile building (a classic in Southern California modern architecture) now occupied by the upscale A'marees boutique.
• What were three things that Newport Beach could "crow" about, according to a Los Angeles Times article in 1883.
• Why a Newport Beach man generated international headlines in 1940.