わからない個所を教えてください。
Once I see one with two tails, lighter than the rest of its body; it lives somewhere near where the wall adjoins Signora Cassi’s house, and I wonder if it has been caught in the kitchen by Lucia.（前回の終わりの部分です）
I go along to the end of the wall, and laboriously find footholds and handholds to help me clamber up. I peer over the top, and for a moment I don’t see him, he is standing so still.
The garden here is, again, larger than ours, and sunnier as well. There aren’t so many trees, and some angle of the valley side seems to have positioned the lawn so that it catches the evening sun straight-on. The doors and windows of the house, all around the ground floor, are open, and I can hear voices – a man and a woman – inside. There are some of the boxes that came from the van, standing on the edge of the grass, waiting to be taken in.
I let my attention wander around the garden, and it is now that I see him: in the shade of a tall purple bush in the border, standing with his hands in his pockets, looking upwards towards where the valley crest reaches the skyline. For a second I think he is looking right at me, but then I see the faraway expression on his face, and know he hasn’t seen me. We stay like that for some time more, he staring at the horizon, I staring at him, like children frozen in a fairytale. Then my foot slips a little, and the sound reaches him, and he shivers and sees me. He looks at once wary, but almost as quickly the wariness vanishes and is replaced by curiosity. He glances towards the house, once, then runs across the garden until he’s standing below me.
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主人公のAlexはartistで、展示会に備えるために、幼い頃過ごしたイタリアに戻ってきています。（この英文は子供時代の回想シーンだと思われます）
There are some of the boxes that came from the van, standing on the edge of the grass, waiting to be taken in.のbe taken inは、家の中に持ち込まれる、という意味ですか？
Then my foot slips a little, and the sound reaches him, and he shivers and sees me.の中でhe shivers and sees me.とありますが、彼が震えたのは（he shivers）、我に返った、みたいな感じですか？
He looks at once wary, but almost as quickly the wariness vanishes and is replaced by curiosity.の中のas quicklyのところは、as quickly as の意味ですか？できるだけ早く？
教えてください。お願いします。
お礼
とてもわかりやすく回答してくださってありがとうございます！ obvious thing の意味がよくとれなかったのですが、自然のことだ、という意味になるのですね。 更に解説を入れていただいてありがとうございます！ よくわかりました！