What are four important events that happen in Chapters 43-48? Explain in detail and quotes please.

In Chapter 43, Estella returns to Satis House without Pip..... and with Drummle, evoking an emotional/physical struggle between the two.

When we drove up to the Blue Boar after a drizzly ride, whom should I see come out under the gateway, toothpick in hand, to look at the coach, but Bentley Drummle!

As he pretended not to see me, I pretended not to see him. It was a very lame pretence on both sides; the lamer, because we both went into the coffee-room, where he had just finished his breakfast, and where I ordered mine.

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“Is it not true,” said I, “that Bentley Drummle is in town here, and pursuing you?”

“It is quite true,” she replied, referring to him with the indifference of utter contempt.

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For, I had by that time come to myself so far as to consider that I could not go back to the inn and see Drummle there; that I could not bear to sit upon the coach and be spoken to; that I could do nothing half so good for myself as tire myself out.

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