They had already arranged their infamous plot ”that he should marry this rich, but rather foolish old lady, induce her to make a will leaving her money to him, and then gain their ends by a very cleverly conceived crime. 
They arranged for him to marry a rich old lady.
They had not yet arranged any kind of plot.
she is swimming
A fountain stands in an empty crossroads.
Independence is achievable.
I couldn't put it into words.
There is a woman about to be up to bat for her softball team.
The dog is in midair.