Question

when did Sherlock Holmes realise that someone was interested and safety of sir Henry​

Answer 1

Answer:

As the fog came curling around the house, Holmes dropped on his knees and put his ear on the ground. He heard Sir Henry's footsteps and that is how he came to know that Sir Henry was coming out of Merripit House.

Explanation:

Answer 2

Answer:

Stapleton’s wife, who was being used to carry out this fiendish (cruel) plan, adopted

the expedient (means) of cutting out the words, which would form the message, and

addressed a letter in a disguised hand. It reached the baronet (Sir Henry), and gave him

the first warnings of his danger-‘As you value your life or your reason, keep away from the

moor’. This made Sherlock Holmes realise that someone was interested in the safety of Sir

Henry.