Looking around the garden with pleasure, Rahial gets into a tree and maked his way through the garden, trying to be quiet. He looked around for guards, as always, and took a special precaution to look for any traps--after all, this is a private garden. If he saw anybody, he climbed high into a tree to avoid them, and only went invisible if absolutely necessary to remain unnoticed. He would not have, however, go invisible if he is already seen, he would try to act natural, hoping there were some exotic animals expected to be in the garden. Taking in a special note of any animal he might see, he made his way to the tree closest to the three-story tall wall, at which point he carefully climbed up the wall and made his way to the roof. Once near the roof, he peeked over to check for any guards, looked into the air for faery guards, as well, then, assuming there were no guards, looked about the roof for possible entry points--skylights and open areas.
If there were no entry points, he would make his way back down the wall from which he came and go inside any open third-story window with nobody inside. If there were, he'd inspect them, and if it seemed safe, he would go inside through one of these entry points instead.