The references to Weed are brief and conveyed by George to illustrate the dangers inherent in travelling with Lennie, and also foreshadowing the events after the death of Curley's wife. George explains how they were'run out' of Weed after Lennie was accused of attacking a girl.
The setting in Chapter 6 returns us to the opening of the novel, indicating the cyclical nature of George and Lennie's lives. Lennie is still described as 'a creeping bear' and he returns to drink from the pool - an action he was reprimanded for by George in Chapter 1. We see the pathetic fallacy of the sunset around the Gabilan's as Lennie's life nears its close -
Lennie turned his head and looked off across the pool and up the darkening slopes of the Gabilans. 'We gonna get a little place,' George began.
We also see the imagery of the heron and the water snake reminding us of the brutal nature of the lives of the characters as they fight for survival in the midst of the Depression. Similarly, the ripples in the pond remind us of the effect that the two men have had on the communities in which they have been a part -
row on row of tiny-wind waves flowed up the pool's surface.