Which detail supports the inference that holmes believes in the importance of reliable alliances when solving mysteries?

what do you mean.

do we have to write a essay?

uh, the answer is d i guess.

evertheless he ought to be slow to believe and to act, nor should he himself show fear, but proceed in a temperate manner with prudence and humanity, so that too much confidence may not make him incautious and too much distrust render him intolerable.

explanation: