Writeacher, I urgently need you to revise the introductory part of Chapter 10 (Dr Jekyll and Mrs Hyde). Can you check tenses,please?

1) In Chapter ten Dr Jekyll comes to the realization of the primitive duality of man. He admits that man is not truly one but two. He is sure that if he can separate his two identities, he will be able to enjoy both lives without guilt or shame.
2) Well before his scientific discoveries, he had daydreamed (?) of separating the good and evil sides which are part of his personality.
3) For this reason, he uses a particular salt ... (you have checked this part).
4) First, he suffers horrible agonies: the most rackling pangs, a grinding in the bones, deadly nausea and a horror in the spirit. Once these agonies begin to subside, he comes to himself as if out of a great sickness. As he changes into Hyde, he experiences a sense of freedom in his increased wickedness.
5) He is physically smaller and younger because, up to that moment, his evil side has always been dominated by the good and is therefore much less exercised.
6) In spite of this, the mark of evil is clearly present on the face of Hyde.
The image of Hyde in the mirror doesn't disgust him though he is aware he has turned into a reckless, tenfold more wicked man.
7) In fact, he finds this image, his pure evil self, much more natural and acceptable than his previously divided self. The others feel him repugnant because, unlike them, Hyde is pure evil.

Sure, I can help you revise the introductory part of Chapter 10. Here are the revised versions of each sentence along with some explanations:

1) In Chapter ten, Dr Jekyll comes to the realization of the primitive duality of man. He admits that man is not truly one but two. He is sure that if he can separate his two identities, he will be able to enjoy both lives without guilt or shame.

Revised: In Chapter ten, Dr Jekyll realizes the primitive duality of man. He admits that man is not truly one but two. He is certain that by separating his two identities, he can enjoy both lives without guilt or shame.

Explanation: The revisions involve minor changes for clarity and consistency of verb tenses.

2) Well before his scientific discoveries, he had daydreamed (?) of separating the good and evil sides which are part of his personality.

Revised: Well before his scientific discoveries, he had daydreamed of separating the good and evil sides that are part of his personality.

Explanation: The revision removes the question mark and changes "which" to "that" for better sentence structure.

3) For this reason, he uses a particular salt... (you have checked this part).

No revision needed for this sentence.

4) First, he suffers horrible agonies: the most rackling pangs, a grinding in the bones, deadly nausea, and a horror in the spirit. Once these agonies begin to subside, he comes to himself as if out of a great sickness. As he changes into Hyde, he experiences a sense of freedom in his increased wickedness.

Revised: First, he suffers from horrible agonies: the most excruciating pangs, a bone-grinding sensation, deadly nausea, and a deep horror in his spirit. Once these agonies begin to subside, he regains consciousness as if recovering from a serious illness. As he transforms into Hyde, he feels a sense of liberation in his heightened wickedness.

Explanation: The revisions aim to improve the clarity and offer more descriptive words for a vivid portrayal of the character's experiences.

5) He is physically smaller and younger because, up to that moment, his evil side has always been dominated by the good and is therefore much less exercised.

Revised: He appears physically smaller and younger because, until that moment, his evil side had always been overshadowed by the good and consequently less active.

Explanation: The revision clarifies the cause of the physical changes and adjusts the verb tenses for consistency.

6) In spite of this, the mark of evil is clearly present on Hyde's face. The image of Hyde in the mirror doesn't disgust him, though he is aware he has turned into a reckless, tenfold more wicked man.

Revised: Despite this, the mark of evil is visibly present on Hyde's face. Although he is aware that he has transformed into a reckless and significantly more wicked man, the image of Hyde in the mirror doesn't disgust him.

Explanation: The revisions aim to improve sentence structure and clarity.

7) In fact, he finds this image, his pure evil self, much more natural and acceptable than his previously divided self. The others find him repugnant because, unlike them, Hyde is pure evil.

Revised: In fact, he considers this image, his pure evil self, far more natural and acceptable than his previously divided self. The others find him repugnant because, unlike them, Hyde is purely evil.

Explanation: The revision enhances the comparison and modifies the word choice for better emphasis.