Kneeling, Vicky lifted each slender leg in turn, easing it into its familiar pony-boot and then buckling it tightly in. Above her, the nervous ponygirl twitched and shuddered, feeling her helplessness growing - and her ordeal approaching. Small squeaks and moans came from behind the loose-gag, which Vicky ignored, having heard them on countless occasions before, with Alexa or some other New Cunt. She thrust the freshly-booted legs wide apart, and attached them to the sides of the frame like Romi's. Finally she firmly inserted the pony's butt-plug, twisting the ring at the end to open the flanges of the plug deep inside Alexa - providing another firm anchoring point for the cleverly-designed harness. Alexa moaned gently - and saliva began to trickle past her loose-gag.

The stable-slut then quickly ran to fetch two sets of harness for the girls. Moline himself began the transformation of each of the naked slaves in turn into harnessed pony-cunt.

Pony harness has a four-fold objective: to make the slender, frail bodies of young girls into strong ponies to pull the waggonettes, to control them absolutely and turn them from a group of individual slave-girls into a team of docile and obedient animals, to leave their breasts and haunches, their bottoms and their cunts open to the whip and, most important, to give them an appearance of erotic splendour. The Princess's harness designers had succeeded magnificently.

First, Moline fitted a wide leather belt tight around the girls' chests. The breasts had to remain naked, targets for the whip, and the belt was eased snugly up to the underside of each firm pair of teats. Moline carefully lifted each breast, ensuring nothing would chafe. Straps from the front of the band passed between the breast and over the shoulders, fastening onto the same belt in the small of the back. Many studs, loops and rings for the attachment of more harness festooned the shoulder straps. The most important part of the harness came next, a metal bar shaped to fit into the curve of each standing girl's spine. Moline inserted the bar into a socket at the rear of the shoulder harness, and pulled a band fixed to the bottom of the bar around the girls' bellies, tightening it hard and buckling it firmly at the front.

Alexa groaned at the pressure on her belly and Moline reached between her open legs and patted her reassuringly on her gaping pussy. She rolled her big, dark eyes.

From the lower part of each bar dangled a single strap. Going behind the animal, he threaded the strap through the ring between her firm bottom-cheeks and buckled it firmly. This thrust the plug even deeper into her, and she groaned again. It still amazed her how fast she could run - be made to run - whilst feeling so filled, behind.

Moline threaded a second strap through the same ring and, leaving the ends dangling, returned to the front. He reached between their legs and pulled each end up between the legs, either side of the pussy-mound with its vivid brand, and finally fastened them to the waistbelt. He grunted softly as he tugged strongly at the buckles, causing the straps to snuggle deeply into girl-flesh. This "V-shaped" strap between their legs balanced the pressure on the bottom-ring, helping to keep the girls' upper bodies tensed and inflexible, but leaving their pussies free. Alexa this time only sighed as she felt the familiar, but still overwhelming conversion into helplessly harnessed ponycunt.

Moline repeated his work on Romi, tightening a buckle here and adjusting a strap there until he was satisfied. The ponies, their upper bodies now at the desired level of utter rigidity, looked at him over their gags with lovely, liquid eyes.

It was a simple enough matter to fit the variously-connected straps of the bridle that completed the turn-out. One band round the forehead was supported by a strap over the crown of the head. Another was fastened around the neck just under the girl's chins. In front of each ear a vertical strap connected forehead-band to collar band, and another ran from the front of the forehead band, reached the top of the nose and branched over each cheek in an upside-down "Y" to connect with the collar-band under the chin. The whole pony-bridle fitted snugly around the girls' pretty faces to provide fixing points for their main command-input - the driving bit.

The girls, however experienced, were always a little reluctant to take the bit, a many-ridged metal bar lying across the mouth with a flat plate extending well into their mouths to press lightly on the tongue. Possibly the metallic taste was unpleasant - more likely the small but well-placed stud on top of the tongue-plate threatened to cause more than a mildly-unpleasant taste!

A strap on either side of the bit-bar buckled to the bridle, holding the device properly in place. The ends of the bar then curved downwards and slighly outwards, ending in rings which would later take reins. Now completely controlled, unable to move except as directed by whoever controlled their bits, the girls could be taken out of the frames to be joined with the last of the many parts of their beautifully-designed harness.

Outside the stables, a light four-wheeled wagonette awaited them. Beautifully made, strong and reasonably light, the rigs could seat two drivers in frankly-luxurious comfort, plus a small amount of baggage. A small sun-shade arched on slender supports over the drivers' seats. It was beginning to heat up now, even this early in the day.

The two girls were carefully backed up between the three short parallel shafts, one in each slot. A wide and heavy belt was then led through the receiving loops in their waistbelts, locking them securely in place. As stable-girls led the other four members of the team towards the rig, Moline knelt down in front of each "shafter" in turn and fastened a heavy metal disc bearing his initials to each cunt-ring. He did the same as each pair of girls was strapped into place, with light chain leading from the three wagon-shafts to either hip - one central chain serving to attach the left hip of the right-hand girl to the right hip of her partner. The chain supported similar heavy belts for each girl that looped through their bellybands and would take the strain when they were put to work. The ponygirls were separated by just enough chain from the pair behind them to allow the driver's long, flexible whip generous access to their helpless bodies.

Stable-girls fussed around the ponies, threading four long reins from the leading pair of bits, back to the bits on the tracers, then to the shafters - and finally to the rail on the front of the wagonette, awaiting the driver's skilled left hand. The long buggy-whip was in its tube, conveniently near to his strong right hand. Moline sauntered up to the rig and lightly vaulted in. Taking whip and reins, he clicked his tongue loudly and cracked the whip in the air.

Totally under control now, their glossy bodies rigid and working as one, the superfit creatures stepped forward smoothly, their arduous training asserting itself as each girl slipped into a deeper, more primitive animal state that would help them meet the physical demands placed on a girl chosen to be one of the Princess's Ponygirls.

Their breasts jiggled, the gold ornaments in the nipples shone and the Princess's brighly coloured brands glistened between the lithe, well muscled thighs as her ponies stepped carefully on their arched hoofboots over the cobbles of the stable yard.