Mr. Hastings, you do not think ”surely it could not have been Lawrence ”Oh, no, that could not be! But I myself was puzzled, and as soon as I was alone with Poirot I asked him what he thought Sir Ernest was driving at. 
The moment Poirot and I were alone, I inquired as to his opinion about what it might be that Sir Ernest was insinuating.
I never had the opportunity to seek Poirot's opinion regarding what Sir Ernest was implying.
The person is a stunt rider.
A group of people are greeting a cowboy.
A group of people climbing a building.
I wanted to strengthen my leg muscles.
The farm workers said the foreman said they could go home.
The girl was doing a jump on her bicycle.