I - smell - death
This relates to the 'Horror' or 'Gothic' theme which is involved throughout the novel. For example, Dill talks about his favourite film Dracula, and the way that 'Boo' Radley is percieved - he got his nickname 'Boo' from the word 'Boogie Man'. The way that Harper Lee describes the Radley place makes it seem really dark and gothic.
"The house was low, was once white with a deep front porch and green shutters, but had long ago darkened to the colour of the slate-grey yard around it. Rain-rotted shingles drooped over the eaves of the verandah; oak trees kept the sun away. The remains of a picket fence drunkenly guarded the front yard - a 'swept' yard that was never swept - where johnson grass and rabbit-tobacco grew in abundance."
"The house was low, was once white with a deep front porch and green shutters, but had long ago darkened to the colour of the slate-grey yard around it. Rain-rotted shingles drooped over the eaves of the verandah; oak trees kept the sun away. The remains of a picket fence drunkenly guarded the front yard - a 'swept' yard that was never swept - where johnson grass and rabbit-tobacco grew in abundance."