Seven best-known opium clippers reported missing in the South China Sea

Background. Clippers were mid-19th-century merchant sailing vessels designed for speed. Opium had to be smuggled into China on smaller, fast-sailing ships called opium clippers, and the India-China opium trade flourished in the nineteenth century. Sylph, built at Sulkea in 1831 for the Parsi merchant Rustomjee Cowasjee, was later purchased by the Hong Kong–based merchant house Jardine Matheson and set a Calcutta-to-Macao speed record in 1833.

Sylph Disappearance. After undergoing re-rigging in Hong Kong in 1848 at a cost of 11,166.22 Mexican dollars, Sylph disappeared the following year, 1849, while en route to Singapore. The passages state she was possibly captured and burned by pirates based on Hainan Island; this attribution remains a possibility rather than an established fact. No supplied passage names a specific sea or coordinates for the loss.

Unverified Ships. The legacy data lists Coquette, Kelpie, Greyhound, Don Juan, Mischief, and Anna Eliza as missing in 1849. However, the supplied passages do not provide specific details regarding these vessels' construction, ownership, masters, or the circumstances of their disappearance. Consequently, these claims remain unverified by the available evidence.