Charity
The theme of charity is satirized in the play. The Brewster sisters appear to be quite altruistic, providing help when needed for their neighbors as well as opening their door to strangers. They make soup for the sick, serve tea and cakes for the preacher and police officers, collect toys for needy children, and provide lodging for lonely old men. They must be the right kind of men though. The sisters have their own rules about how far their charity will extend.

They do not, for example, want to think about the devastation of the war in Europe, which to them has become inconvenient because it may cause them to use ‘‘that imitation flour again’’ as did the first world war. Also, the war involves foreigners, who are not acceptable to the sisters. They prefer ‘‘good’’ American Christians, more specifically Episcopalians. Methodists like Mr. Hoskins are welcomed into their homes, but only because the sisters are so ‘‘charitable.’’ Their own nephew Jonathan is not welcomed because his behavior throughout his life has been undesirable.

Of course, the greatest problem with the sisters’ charitable activities is the fact that they have murdered eleven of the lonely men who have come to their home looking for lodging. They determine that they know best what these men need, and that only through death and a good Christian service at their burial will they find the peace they deserve. The sisters, however, make the end as painless as possible as they poison the men with elderberry wine tainted with arsenic. They are pleased with the fact that one of the men actually praised the wine right before he expired.

Insanity
The audience, along with Mortimer, soon learns that the sisters are as insane as the obviously deranged Teddy, who thinks that he is Teddy Roosevelt and so continually blows a bugle and charges up the staircase as if it were San Juan Hill. Because the sisters do not display such...