"The Crates Are the Keys"...

Carbine rushed to hide behind the crates used to store Geomarrow. "They took Pava!" This terrible thought kept echoing in his mind. "Maybe we shouldn't be looking for Drake's treasure in the first place." However, regret won't bring Pava back. Carbine needed to think of something to do to help.

Becky placed her hand on Carbine's shoulder, trying to calm him down. Just a few days ago, they were eating suncakes and talking about how to spend the holiday. Now, they were involved in an unexpected conspiracy. Why did those who attended the gathering want the treasure? Where was Drake's underground hidden door? And what would they do to Pava... She couldn't answer any of these questions.

"Hold on." Becky picked up a piece of paper. It looked like something used by the school they went to, which meant it was left by Pava. "There's nothing on the paper, and it's sticky."

"Sticky? It might be Pava's invisible ink." Carbine recalled the small things he made in the secret base, and how he used invisible ink to write things down. If the text was written with brine, you heat the paper. If it was written with white candle, use charcoal powder to make the text visible... "Let me have a go!"

And sure enough, the piece of paper carried secret information. Carbine moved the paper under the light of a miner's lamp, and a line of fragmented text appeared.

"Shelves, crates, arrange, same."

The text was just some words pieced together, which is of no surprise, given Pava couldn't see what he was writing. He had to make things simple and space out the letters. Becky gave it a quick thought and it dawned on her that Pava was sharing clues that could lead to Drake's hidden door.

"The crates are the key. Opening the hidden door is easier than doing chores." Becky read with excitement.

— Dear readers, do you know what she should do?

Mole Tip:
If you pay close attention to the shelves on both sides, you'll be able to figure out the answer on your own.

战地追迹……

「别让他们跑了！」鼹鼠队身后不断传来了集会者的喊叫声，这些贪婪的坏蛋已经追了过来。小鼹鼠们没有减慢速度，直接冲进了铁卫禁区。三只小鼹鼠回头张望，只见得这些鬼鬼祟祟的集会者们在禁区外气得捶胸顿足。

帕瓦的叔叔是银鬃铁卫的军官，在他的帮助下，小鼹鼠们在银鬃铁卫的保护下来到了军营的深处——也就是德雷克宝藏提到的地方。「帕瓦，并不是我不厚道，你难道不能叫你的叔叔把那些坏蛋都抓起来吗？」卡宾还有些生气。「他们过去将你抓走，这就已经违反法律了。」

「放心，他们逃不掉的。」帕瓦的叔叔曾经无数次帮助鼹鼠队化险为夷，他是鼹鼠队最可靠的伙伴。「这些事情就交给我们大人来处理吧，你们的冒险还差最后一步，去完成它吧。」

贝琪打开了德雷克最后的讯息：「勤勉又机智的士兵每天都会检查4处枪架，确保它们各自摆放着3把枪支，不多不少。」

「嗯…真的有人会在禁区里藏什么宝藏吗？」帕瓦的叔叔从来就不相信隐形的宝藏，因为这里是军队驻扎的地方，无论是几百年前的德雷克，还是几百年后的谁谁谁，都不可能在军队里藏起不为人知的宝藏。

「既然是隐形的宝藏，就一定有定位它的方法。」卡宾略作思考，他已经知道隐形的宝藏所在之地了。

——亲爱的小读者们，你们知道他该找到宝藏了吗

鼹鼠提示：
仔细观看周围的符合「3把枪支」的摆设，自然可以找出答案。

Treasure Hunt on the Battlefield...

"Don't let them get away!" The gathered crowd shouted incessantly from behind The Moles as these greedy criminals pursued them. The little moles rushed right into the Silvermane Guard Restricted Zone, not stopping at all. When the three little moles turned around, they saw the pursuers beyond the restricted zone stomping their feet in rage.

Pava's uncle was a Silvermane Guards officer, and with his help, the little moles made their way to the camp's depths — the location where Drake's treasure had hinted. "I'm not heartless, Pava, but couldn't you get your uncle to arrest all those bad guys?" Carbine was still enraged. "They kidnapped you, which is against the law."

"Don't worry. They're not getting away from it." Pava's uncle had helped the Moles countless times in perilous situations, and he was their most dependable collaborator. "Leave these things to us adults. Your adventure is still one step away from being completed. Go finish it."

"The industrious and smart soldier will check the 4 gun stands every day to make sure there are exactly 3 guns per stand, no more and no less." Becky read from Drake's last message.

"Hmm... would someone really bury treasure in a restricted zone?" Pava's uncle never believed in the invisible treasure because this was where the army was stationed. Neither Drake from hundreds of years ago nor anyone centuries in the future could have buried unknown treasures in the middle of the army.

"Since it's an invisible treasure, there has to be a means to find it." Carbine paused for a moment, convinced that he already knew where the invisible treasure was hidden.

— Have you got any ideas on how he will find the treasure, my young readers?

Mole Tip:
If you pay close attention to the decorations nearby that fit the description of "3 guns," you'll be able to figure out the answer on your own.

后记再怎么难解的谜题，都难不倒鼹鼠队，「德雷克隐形的宝藏」至此已经抵达尾声。

在这一次的探险之旅中，三只小鼹鼠再一次证明了自己的侦探能力。哦，当然这一次探险，最大的功臣还是你，我们的第四只小鼹鼠！

熟悉冒险鼹鼠队的小读者们知道，这样的冒险只是个开端而已，小鼹鼠们之后的冒险故事还多着呢！对于故事中大冒险家德雷克来说，伟大的冒险即便一生之中经历一次，也已经足够了。但是对我们的小读者来说，这样的冒险还远远不够。

我为什么会这么说呢？是因为我想继续卖书吗？当然有这样一部分的原因。而更重要的是，我想为我的小读者们「拥有冒险的体验，却不必承受其风险」。我可不希望你在现实中遇到任何一个心怀鬼胎的家伙，不需要像三只小鼹鼠一样被卷入危机之中。

我经常收到一些家长朋友来信质问我：「我不想让我家的孩子再看你的书了，因为他们只会效仿鼹鼠队，去做一些危险的大冒险。」对于这样的信件，我常常不知道如何回复。要是我表现得不负责任一点，我会说「去吧！人类就是应该要去冒险」；但是考虑到这位家长的担忧，我会说「只是在家里看看书就能冒险，不用承受任何风险，这已经是我能想到的『最安全的冒险』了。不会吧，连这样的『冒险』也不可以吗？」

作者总是作品的后记里大吐苦水，请原谅我也效仿了一下。话又说回来，在这一次的冒险故事里，你跟随着三只小鼹鼠的足迹走了一遍，虽然没有遇见可怕的集会者（毕竟是我编出来的），但是你用自己的好奇心和想象力已经完成了最棒的冒险了，不是吗？

那正是我想要的。

在这里，我再次恭喜你完成了冒险，让我一起再次喊出鼹鼠队的口号！

鼹鼠，鼹鼠，
能文能武！
鼹鼠，鼹鼠，
当家做主！

PostfaceThe Moles will solve the mystery, no matter how difficult it is, and "Drake's Invisible Treasure" is nearing its conclusion.

The three little moles displayed their investigative skills again in this adventure. And of course, you, our fourth little mole, are the most important contributor to the adventure!

Young readers who have read The Adventurous Moles know that this is only the beginning of their exploits, and the little moles have many more adventures ahead of them! Drake, the story's great adventurer, is content with a fantastic adventure, even if it is only once in a lifetime. However, such an adventure is not enough for our young readers.

What gives me the right to say such a thing? Is it because I'd like to keep selling books? Of course, this is a factor. But, more importantly, I want to give my young readers "the experience of adventure without the peril of it." I don't want you to meet any bad guys in real life, and I don't want you to be trapped in a crisis like the three little moles.

Parents frequently write to me. "I don't want my children to read your stories anymore because they will just follow The Moles and embark on dangerous adventures." Such letters often baffle me. If I were irresponsible enough, I would tell them, "Give it a shot! Humans are supposed to go on adventures." However, given the parent's concern, I would respond, "The safest adventure I can think of is merely going on an adventure at home by reading a book without taking any risks. What, not even such an adventure is permitted?"

Authors are notorious for complaining about their hardships in the postface of their works, so please forgive me if I do the same. You followed in the footsteps of the three little moles in this adventure story, even though you did not encounter the dreadful gatherers (after all, I made it up), but you used your curiosity and ingenuity to complete the best adventure, right?

That is precisely what I am looking for.

I want to congratulate you on finishing your adventure once again, and please allow me to shout out The Moles' slogan!

The Moles, the Moles,
are brilliant and strong!
The Moles, the Moles,
take the reins!