《窃天书：全2册》第四十节

The user wants a summary of this chapter, approximately 220 characters in modern vernacula……

The user wants a summary of this chapter, approximately 220 characters in modern vernacular Chinese. Let me identify the key events:

1. The group follows the snake through treacherous terrain (金兰泽 etc.), passing landmarks named after Pang Sun betrayals, and arrives at 画皮山庄 (similar to 绣虎山庄). 2. They explore the strange buildings (孤独门, 冗余馆 etc.) and garden. 3. 钱大笸箩 and 鹰爪孙 secretly meet, reveal they are both 光明堂 agents for 大元, suspect 蝶恋花 of being a spy who manipulated the tattoo and snake; plan to drug her and continue the act. 4. They eat, then check the corpse - tattoo changed again with new verse.

Need ~220 characters, 1-3 paragraphs, no evaluation words, no copied sentences over 8 chars.</think>众人随青蛇前行，一路经过以孙膑庞涓旧事命名的险地，平安渡过金兰泽等地，天亮时来到一座形貌酷似绣虎山庄的"画皮山庄"，门上悬匾，对联暗含知人知面之意。庄内殿宇分别题为孤独门、冗余馆、颠倒塔等怪名，园中花草艳异，众人呼喊无人应答，青蛇也不知去向。

钱大笸箩借打野味之机与鹰爪孙暗中对上切口，亮明二人同为大元光明堂刺青卫士的身份。他指出蝶恋花指甲标识不对、对诗时接不上，怀疑刺青变化与青蛇都是她一手捣鬼，背后主谋亦可能是她；但念及同门之情，决定先给她服下七虫七花丹加以牵制，同时不动声色，继续追查宝藏。二人烤好野味与众人分食，蝶恋花抱着花绣虎尸体滴泪不食。随后钱大笸箩解开尸身寿衣，见脊背刺青再度变化，显出四句新语，两人相视会意，鬼谷花随口作解。