Sentence:  There was an especially good entry, thirty-nine horses, representing twenty-two regiments, being entered in the Light Weight race, which was for horses five years old and upwards, the property of oflicers on full or half pay of the Regular Army, that had not won a race under the recognised rules of steeplechasing in any country, point-to-point races excepted; while eighteen faced the starter in the Welter race, in which the conditions were the same, excepting that the <WSD>catchweight</WSD> was 13 st. 7 lb. 
Meaning of the word marked with <WSD> tags:  A weight category other than the standard weight categories: either an agreed-upon weight range or an agreement to allow any weight.