Polo, Marco, [128].

Portugal, [178], [208], [222].

Posting, [128].

Pound for catching stock, [101].

Practical jokes by horses, [85], [86], [87].

Prairie, [7].

Psychology, [84] et seq.

Prejevalski horse, [9], [31], [36], [41], [51].

Propping, [77].

Protective colour, [14], [30].