Walton

1. affectionate

1.1. sister

1.1.1. letters

1.1.1.1. story

2. determined

2.1. risky trip

2.1.1. perilous journey

2.1.1.1. up north

2.1.1.1.1. adventure

3. interested

3.1. Victor's story

3.1.1. asking to hear it

3.1.1.1. relaying it to his sister

3.1.1.1.1. remembers a lot of what Victor said apparently

4. willing

4.1. despite the dangers and risks, Walton wants to go

4.1.1. writes extensive letters

5. sheltered

5.1. under his sister's protective care