A negative with no associated positive of small boats heading into the city of Port Sudan, Egypt. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive of passengers in lifeboats preparing to tender near Port Sudan, Egypt. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive of small boats outside the city of Port Sudan, Egypt. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive of passengers boarding the lifeboats in order to disembark in Port Sudan, Egypt. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, looking out from the ship at the shore while passing through the Suez Canal, Egypt. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, looking out at the shore, with boats and what are believed to be fishing nets visible as well. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, looking out at the shore from the ship. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, looking out from the ship at the waters near the Suez Canal, Egypt. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, taken from the ship looking at the city of Port Said, Egypt, with a boat in the foreground.

A negative with no associated positive of boats in the water, as well as the city of Port Said, Egypt, near the Suez Canal. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, of buildings along the shore, with small docks. With people and a car visible as well. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no associated positive, of the Suez Canal, with the city of Port Said, Egypt, in the background. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10313. Looking along the street in Mombasa, Kenya, with a number of people and cars and shops. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10312. People walk along the street past the National Bank of India and the Police Station, in Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10311. Looking down a narrow street in Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10310. A young man pulls a cart of elephant tusks down the street in Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10309. A church in Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10308. A small home in Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10306. The walls of a fort, Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10305. Men walk in a small street in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10304. People and rickshaws line the street in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10303. Street in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10302. Two men stand in the archway of the hotel in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10300. People walk along the street, including a man pulling a rickshaw, in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10299. People walk by the old palace, in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10298. People walk past vendors on the street, Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10297. A boat tying up at shore, in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10296. People inside a shop in Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10295. In Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10294. Near Zanzibar, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A closer up version of image CC-PH-10531. A negative with no known positive, of three people with a dog standing in front of a house. Believed to be in Mombasa, Kenya, or Dar-es Salaam, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of an image with no known positive. Three people and a dog stand in front of a house, while a fourth stands above them on the landing of the house. Believed to be taken in either Mombasa, Kenya, or Dar-es Salaam, Tanzania. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10293. Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10292. Children swimming at the beach in Mombasa, Kenya, with boats visible as well.

Negative of image CC-PH-10291. A sailboat, near Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10290. Near Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10289. The New Africa Hotel in Mombasa, Kenya. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10288. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

A negative with no known corresponding positive, depicting a jungle, believed to be near Durban, South Africa. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10364. A man in a white suit lounges on a chair smoking a cigarette. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10398. People swimming in, and lounging by, the pool, in Durban, South Africa. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10397. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10396. A monkey sitting on the ground. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10395. A monkey in a tree. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10274. A man sits in a rickshaw being held by a man with a large headdress; in Durban, South Africa. A ship, presumably the Duchess of Atholl is in the background. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10271. Looking across a bridge towards a statue and a city street in Durban, South Africa. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10270. A man in a white suit leans against a railing while smoking a cigarette. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10269. Five men form a human pyramid while one stands beside them; in Durban, South Africa. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10267. With people walking along the boardwalk and cars parked on the side of the road. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.

Negative of image CC-PH-10265. Photograph taken while on a cruise to South America and Africa on the Duchess of Atholl.