Mary Lincoln's engraved opera glasses?

[Eva Elisabeth]

Those old opera glasses (I have one) are pretty heavy. I wouldn't like to carry more than one, despite you need a handbag of appropriate size for two. Roger - for watching a ballet I would definitely would want to make use of them to see the technique of the feet precisely. Same goes for piano or other concerts, see the technique of playing the instruments. Opera anyway. But theater - I've never carried my glasses along. What.for?