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When the system was switched on at night； nothing larger than a raccoon could e within thirty feet of the house…or enter the barn at the back of the property…without tripping the alarm。 No bells would ring； and no sirens would blare because that would alert The Outsider and might run it off。 They didn't want to chase it away； they wanted to kill it。 Therefore； when the system was tripped； it turned on clock radios in every room of the house； all of which were set at low volume so as not to frighten off an intruder but high enough to warn Travis and Nora。
Today； all the sensors were in place； as usual。 All he had to do was wipe off the light film of dust that had coated the lenses。
〃The palace moat is in good repair； m'lord；〃 Travis said。
Einstein woofed approval。
In the rust…red barn； Travis and Einstein examined the equipment that； they hoped； would provide a nasty surprise for The Outsider。
In the northwest corner of the shadowy interior； to the left of the big rolling door； a pressurized steel tank was clamped in a wall rack。 In the diagonally opposite southeast corner at the back of the building； beyond the pickup and car； an identical vessel was bolted to an identical rack。 They resembled large propane tanks of the sort people used at summer cabins for gas cooking； but they did not hold propane。 They were filled with nitrous oxide； which was sometimes inaccurately called 〃laughing gas。〃 The first whiff did exhilarate you and make you want to laugh； but the second whiff knocked you out before the laugh could escape your lips。 Dentists and surgeons frequently used nitrous oxide as an anesthetic。 Travis had purchased it from a medical…supply house in San Francisco。
After switching on the barn lights； Travis checked the gauges on both tanks。 Full pressure。
In addition to the large rolling door at the front of the barn； there was a smaller； man…size door at the rear。 These were the only two entrances。 Travis had boarded over a pair of windows in the loft。 At night； when the alarm system was engaged； the smaller rear door was left unlocked in the hope that The Outsider； intending to scout the house from the cover of the barn； would let itself into the trap。 When it opened the door and crept into the barn； it would trigger a mechanism that would slam and lock the door behind it。 The front door； already locked from outside； would prevent an exit in that direction。
Simultaneous with the springing of the trap； the large tanks of nitrous oxide Would release their entire contents in less than one minute because Travis
had fitted them with high…pressure emergency…release valves tied in with the alarm system。 He had caulked all of the draft…admitting cracks in the barn and had insulated the place as thoroughly as possible in order to insure that the nitrous oxide would be contained within the structure until one of the doors was unlocked from outside and opened to vent the gas。
The Outsider could not take refuge in the pickup or the Toyota； for they would be locked。 No corner in the barn would be free of the gas。 Within less than a minute； the creature would collapse。 Travis had considered using poisonous gas of some kind； which he probably could have obtained on the underground market； but he had decided against going to that extreme because； if something went wrong； the danger to him and Nora and Einstein would be too great。
Once gas had been released and The Outsider had succumbed； Travis could simply open one of the doors； vent the barn； enter with the Uzi carbine； and kill the beast where it lay unconscious。 At worst； even if the time taken airing out the building gave The Outsider a chance to regain consciousness； it would still be groggy and disoriented and easily dispatched。
When they had ascertained that everything in the barn was as it should be； Travis and Einstein returned to the yard behind the house。 The December day was cool but windless。 The forest surrounding the property was preternaturally still。 The trees stood motionless under a low sky of slate…colored clouds。
Travis said； 〃Is The Outsider still ing？〃
With a quick wag of the tail； Einstein said； Yes。
〃Is it close？〃
Einstein sniffed the clean； winter…crisp air。 He padded across the yard to the perimeter of the northern woods and sniffed again； cocked his head； peered intently into the trees。 He repeated this ritual at the southern end of the property。
Travis had the feeling that Einstein was not actually employing his eyes； ears； and nose in search of The Outsider。 He had some way of monitoring The Outsider that was far different from the means by which he would track a cougar or squirrel。 Travis perceived that the dog was employing an inexplicable sixth sense…call it psychic or at least quasi…psychic。 The retriever's use of its ordinary senses was probably either the trigger by which it engaged that psychic ability…or mere habit。
At last； Einstein returned to him and whined curiously。
〃Is it close？〃 Travis asked。
Einstein sniffed the air and surveyed the gloom of the encircling forest； as if he could not decide on an answer。
〃Einstein？ Is something wrong？〃
Finally； the retriever barked once： No。
〃Is The Outsider getting close？〃
A hesitation。 Then： No。
〃Are you sure？〃
Yes。
〃Really sure？〃
Yes。
At the house； as Travis opened the door； Einstein turned away from him； padded across the back porch； and stood at the top of the wooden steps； taking one final look around at the yard and at the peaceful； shadowed； soundless forest。 Then； with a faint shiver； he followed Travis inside。
Throughout the inspection of the defenses during the afternoon； Einstein had been more affectionate than usual； rubbing against Travis's legs a great deal； nuzzling； seeking by one means or another to be petted or patted or scratched。 That evening； as they watched television； then played a three…way game of Scrabble on the living…room floor； the dog continued to seek attention。 He kept putting his head in Nora's lap； then in Travis's。 He seemed as if he would be content to be stroked and have his ears gently scratched until next summer。
From the day of their first encounter in the Santa Ana foothills； Einstein had gone through spells of purely doggy behavior； when it was hard to believe that he was； in his own way； as intelligent as a man。 Tonight； he was in one of those moods again。 In spite of his cleverness at Scrabble…in which his score was second only to Nora's； and in which he took devilish pleasure forming words that made sly references to her as yet unnoticeable pregnancy… he was nonetheless； this night； more of a dog than not。
Nora and Travis chose to finish the evening with a little light reading… detective stories…but Einstein did not want them to bother inserting a book in his page…turning machine。 Instead； he lay on the floor in front of Nora's armchair and went instantly to sleep。
〃He still seems a little draggy；〃 she said to Travis。
〃He ate all his dinner； though。 And we did have a long day。〃
The dog's breathing； as it slept； was normal； and Travis was not worried。 Actually； he was feeling better about their future than he had for some time。 The inspection of their defenses had g