Hendo had both the antepost Triumph Hurdle favourite Lulamba and £1.2 million buy Palladium entered up at Kempton, but neither were declared.
He had said earlier in the week he would send one - not both - to the Adonis and would make his decision after a piece of work on Tuesday morning.
Hendo will take a group of horses for his traditional pre-Festival racecourse gallop at Kempton next week, though he has yet to decide who will be put through their paces.
Constitution Hill, who worked abysmally at Kempton last February and was ruled out of the Champion Hurdle shortly afterwards through illness, is unlikely to be one of them.
But, given the disaster that struck at Seven Barrows last February when the yard was hit by a virus, punters became a little spooked when neither horse was declared.
