Explanation:
The Tide Rises, the Tide Falls. ... The morning breaks; the steeds in their stalls Stamp and neigh, as the hostler calls; The day returns, but nevermore Returns the traveller to the shore, And the tide rises, the tide falls.
B, D, F, G
Hope this helps :)
What excerpt? Can you provide a picture? Otherwise just in general, Lady Macbeth is ambitious to a fault.