Sentence:  Every design that villany could suggest was had recourse to in the hopes of nobbling Wild Dayrell; but never being left for an hour by either his trainer or jockey, he escaped the intended “coopering,” even when the <WSD>lynchpins</WSD> of the wheels of his van had been tampered with. 
Meaning of the word marked with <WSD> tags:  A pin inserted through holes at the end of an axle, so as to secure a wheel.