Green Spectacles

This is one of the items that the passengers are asked to bring with them on the trip. Twain does not explain why, and it is not revealed until chapter 45 that the green spectacles are for the Syrian desert, to keep the sun and sand out of their eyes. Sunglasses were not invented until the early twentieth century, and the passengers needed something strong to block the UV rays. Twain will comment in chapter 45 how silly they all looked wearing the spectacles.

Kid Gloves

Kid gloves are soft leather gloves usually made from kidskin. These are first introduced in Gibraltar, where it was fashionable to wear kid gloves to the theater. Mark Twain gets charmed by a pretty woman into buying gloves that were too small for him. The mention of kid gloves comes up in a couple other countries/chapters.

Grapes

Vineyards are found sporadically...