How does Harper Lee use details to present Calpurnia's church to the reader?

"First Purchase African M.E. Church was in the Quarters outside the southern town limits, across the old sawmill tracks. It was an ancient paint-peeled frame building, the only church in Maycomb with a steeple and bell, called First Purchase because it was paid for from the first earnings of freed slaves. Negroes worshiped in it on Sundays and white men gambled in it on weekdays.

The churchyard was brick-hard clay, as was the cemetery beside it. If someone died during a dry spell, the body was covered with chunks of ice until rain softened the earth. A few graves in the cemetery were marked with crumbling tombstones; newer ones were outlined with brightly colored glass and broken Coca-Cola bottles. Lightning rods guarding some graves denoted dead who rested uneasily; stumps of burned-out candles stood at the heads of infant graves. It was a happy cemetery.

The warm bittersweet smell of clean Negro welcomed us as we entered the churchyard—Hearts of Love hairdressing mingled with asafoetida, snuff, Hoyt’s Cologne, Brown’s Mule, peppermint, and lilac talcum"