Perhaps one reason why they had remained single was, that externally they were so like each other that a suitor must have been puzzled which to choose, and may have been afraid that if he did choose one, he should be caught next day kissing another one in mistake.

They were all tall, all thin, with long throats--and beneath the throats a fine development of bone.

They had all pale hair, pale eyelids, pale eyes, and pale complexions.

They all dressed exactly alike, and their favourite colour was a vivid green: they were so dressed on this occasion.
As there was such similitude in their persons, so, to an ordinary observer, they were exactly the same in character and mind.

Very well behaved, with proper notions of female decorum: very distant and reserved in manner to strangers; very affectionate to each other and their relations or favourites; very good to the poor, whom they looked upon as a different order of creation, and treated with that sort of benevolence which humane people bestow upon dumb animals.