The conclusion of Susan Glaspell's one-act play with Mrs. Hale and Mrs. Peter's decision to withhold the evidence of the dead canary is comparable to the decision of Sheriff Heck Tate to record the death of Bob Ewell as that of a man falling upon his own knife. For, in both cases, it is "a sin to kill a mockingbird." The harm has already been done, and the perpetrator of the evil is also apprehended; and, the victims of the injustice have long served their masters in subservience and melancholy and isolation.
With dramatic irony Lewis remarks while in the kitchen,‘‘Well, women are used to worrying over trifles.’’ For, Mrs. Hale and Mrs. Peters do exactly the opposite. They hide the trifle of the dead canary whereas the men would use it as evidence against Mrs. Wright. Perceiving the singing bird as the last aesthetic the poor woman had left in her dismal, isolated life, Mrs. Hale and Mrs. Peters regard more than the obvious details in concluding that Mrs. Wright, like Boo Radley, had suffered enough in her lifetime already and should not be held for murder.