 Tarzan and the Diamond of Arshere! Tarzan, Tom and his little safari are now a part of the Tarzan-Gregory expedition. Tom has agreed to proceed with Tarzan and his friends to Tuinbaka under the leadership of the Eight-Man, the forbidden city of Arshere being the common goal. Tom is after the father of Diamonds, the talismanic gem of the Hesse Herrings, while Tarzan and his companions hope to find Helen Gregory's brother, Brian. Helen mysteriously vanishes from the midst of the encamped safari and without pausing to pick up a weapon, Darno rushes blindly out into the black jungle night in search of her. Tarzan disappears into the branches of a tree near the edge of the Boma. Tom walks slowly back to the fire and magra, where Wolf and Larsen presently join him. A look of mystification is in Tom's eyes. Oh, never do that. I thought now, Tarzan, you were for dreaming when you told me this man's ability to swing into the trees like an ape. It is uncanny, Atan. Even now I am not yet used to it. You watch, he'll have that Frenchman back here in a year free. Hmm, I can't understand what happened to that girl. She wouldn't have walked out into the jungle alone this time of night. The shock of losing her father may have temporarily affected her. But she appeared to be getting over it wonderfully. All day long, she fought her tears and kept us under control. Yeah, sure. But it worked inside. She hid it from us. Yeah, I know what it means to put never mind. We get up a search spot in the morning, we'll look for her. If she wandered off alone, she cannot be far. We'll find her. But if she did not go alone... What do you mean, Atan? If she did not go alone? I was merely thinking about magra, to vanish like that syrup by friends and natives. Strange, is it not? Why? Yes, it is strange. I cannot... There, Tarzan and the Frenchman coming back. This Tarzan, he is in love with the young lady magra. Is that not self-evident? Tom, I'm leaving magra in your care. Magra has been under my protection for many years since she was a child. Tarzan, you and Wolf carry on. Yes, sir. Tom has the map, according to his suggestions. Tarzan, you are aware that you will not leave the safari. Of course, my friend, but I... That's all I want. You are not to leave the safari under any circumstance. I'll be back sometime. You will be back. But where are you going? To find Helen. I'll catch up with you all with you as soon as I can. But how are you going to find her? There isn't a trace. Leave that to me. Tom, I have your word that the natives will be treated properly. You have? They will have no cause to complain. I may be gone for a few hours only. It may be days. But don't worry. Keep going toward Toonbaka. Here's my gun, Tarzan. He will take Gregory's. Keep your rifle, Arson. I don't need it. But for protection, arrive. I have all the weapons I need. You... you will not let me go with you, Monami. Yeah, I was just saying, if you organize a search party in the morning, wouldn't that be... And waste time, Wolf. No, Dono. This time, I'm going alone. I want to make speed. Ah, oui. Moi, je comprends. Then that's all. Keep things moving, Tom. Dono, goodbye. Good-bye, Tarzan. I suggest that we follow his advice to the letter. Lieutenant Dono? Absolument. We will press on. After day, through mile after mile of chronic verger that cries aloud its beauty, the safari forges ahead, deeper into the thick green oppressiveness of the jungle. All but Dono have given up hope and finding Helen Gregory alive. Even the Frenchman's great abiding faith in his friend's ability to accomplish the impossible is gradually waning as the days pass and Tarzan fails to return. This is a great thing, my friend. But even that has its limitations. The shadow moves as the sun directs. Oui, monsieur Tom. But you do not know Tarzan as I know him. I believe him to be absolutely immune from death caused by man or beast. Non, non, je vous assure, he will return. None of us are immune from death, Dono, particularly in the jungle. It stares at us from behind every bush, every tree beside our path. Still, I hope you are correct and that Tarzan will return. Eight days we have gone on. And still no trace of either one or the other. Strange. I like that other. What are you thinking of? And what is so strange? I was merely indulging in my usual pastime, thinking aloud. It is odd how one can vanish from the midst of a large camp without leaving so much as the slightest trace. I've been thinking of it ever since the night Helen Gregory disappeared. Et moi, I cannot understand it. We should have found at least some indication of what happened. It recalls to my mind the similarly peculiar disappearance of the young lady's brother, Brian Gregory. I understand now what you mean, Atan. Do you, my child? I wonder. Come on, Tom. There appears to be trouble. What is it, Mbule? What do you mean? Where has he gone? Who are you, Mbule? He never spit it. Where did he go? Pusko, Buannalasen. Shetani, Angusha, Buannalasen. Duli, Watamishi. Duli, Simila. No, Mbule. What has happened? Buannalasen walk along Cut Trail. Pretty soon no more. Shuka, Don. Buannalasen go into the ground. Where, Mbule? Where did Buannalasen go into the ground? Shuka, there. Along Big Hole. Tarzan, come over here. What is it, Lieutenant? What has happened to Mr. Lassner? Mbule says something about his going into the ground. Disappeared. What have you found, Tom? I do not know. Magra, stay away from that hole. It looks like some sort of native trap. An elephant trap or... No, no, no. Lassom, are you all right? Where are you, man? I came up to see what is stopping the safari. Will you get one of the prepared flares, Donald? Still more. Just one more more. Well, one got to svillent home. What is the svilletowing down in that hole? Some kind of an animal trap into which he fared. Hey, wait. Here is the torch, Mr. Tom. Here is the flare, Lassom. Have you matches? Yes, sir. Dessert looks like it had been turned over recently. Well, get ropes. I am going to the... The man is right. Look here. Just inside this hole. Sir. Wolf, give me two of those flares. Remain here with Magra and keep the natives back from this opening. Yes, sir. Use the torches. What in the devil is this? Bats. They were not hurt, Joe. Here, Donald. Take this flare. Go ahead. I will follow. Donald, this has been made by the hand of man. This stairway. Those stone walls. A causeway. Disused. Ancient. But you are correct, Tom. It is my name. Yeah, sure. That's a thank you. There must be ventilation. Here is dry, hot, but pure enough. Come over here, old tenant, Mr. Tom. See if you can make this out. It's writing on the wall. Mesa. Priestie. All the torches closer. There. So, can you decipher it, Tom? Hieroglyphs. Egyptian, if I'm not mistaken. This sort of picture, I think, dates back to three or four thousand years before Christ. Tom, there, but it is most certainly very well preserved. I wonder what it means. You cannot, by any chance, dig it, Mr. Tom. I? Of course not. Why do you ask that? Merely because I should like to know what that writing means. No, no. I have no idea what it means. But I shall nevertheless make a copy of it and look it up later. Larson, you go and bring Wolf and Margaret down here. Then we shall explore a little. Did you notice, Tom, that this causeway seems to be leading well in the general direction in which we are going? At least in the other direction through the tenant. We hit it between both ends. There you go up and get Margaret and Wolf. What does all of this mean, Mr. Tom? I do not know. There is no doubt that causeway was built by man back in the dim past. Look at that masonry. Those rock-hewn stairs. What sort of people built and used these centuries ago? Egyptians probably. Because hieroglyphs seem to prove that. Eh, what they find for an archaeology, sir? What a strange place, Tom. What have you found? I found something. You were? What is it? Well, I was snooping around up there before Larson came after us. And I regret my life that the earth around that hole that Larson fell to has been dug up lately. It is soft. You know not back down like the ground. All are now certain of that? Eh, positive. You know that ground was put there from the outside or thrown up from the inside to cover up the hole. I wonder. Tom! Margaret! Tom here! All of you, thief! What have you found, Baron? Here, look, close to the foot of the wall. Good heavens. It is writing.