Driven by a desire to protect Sir Henry Baskerville and solve the mystery surrounding the Baskerville curse, Mortimer seeks Holmes's expertise to bring rationality to a seemingly supernatural problem.
Mortimer approaches Holmes as a respected expert, seeking his help and trusting his deductive abilities.
Mortimer acts as a protector and advisor to Sir Henry, guiding him through the dangers of Baskerville Hall and the moor.
Mortimer is aware of Barrymore's role in the household and interacts with him as part of the local network of characters.
Fears the curse and the dangers it poses to Sir Henry and the local community; also fears the unknown elements of the case.
Wants to ensure Sir Henry's safety and uncover the truth behind Sir Charles's death and the legend of the hound.
Guided by scientific inquiry and a strong sense of duty to his patients and friends, Mortimer acts ethically and responsibly, prioritizing truth and protection.