Unlikely that Mrs Grant had a horse.. THey cost money and the Grants weren't all that well off, and Mrs G is a middle aged lady, and problaby not an outdoorsy type. If she did have a horse, I doubt if Edmund wouldl have loaned Mary his.. unless JUST possibly, he might feel that it was deprving Mrs G of her transport. But its more likely that ther was no lady's horse at the Parsonage and if Edmund did not loan Mary one from his own stable or hte MP stables, she would not have one to practice on...