The demon Violin was deep in the rain forests, tracking elusive leopards, when the note found him, and for the first few minutes following, he could only stare at it. He took security and awareness of one's soroundings seriously, as their was no telling when Tien, or perhaps even the dreaded Son Goku who had killed his master, might come for him. The fact that somebody could get the drop on him like that was rather unnerving.
Still... neither of those people had 'H' as an initial, nor would they be likely to beat around the bush if they wanted the demon dead. And although trickery and subterfuge was likely not above the spawn of his old master, Violin doubted that Piccolo Junior would need to resort to such measures in dealing with his father's old minion turned scholar.
He turned to his native guide, and issued a command. "Attun, Fik, Unekko." -Something urgent has come up, and I need to return to the hotel.-
---
Back in his hotel room, with phone and internet access, Violin gets quickly gets to work. First he looks up the location (likely learning what Dr. Axal did), and then he proceeds to call a travel agent. Whatever this event was, the mysterious 'H' saw fit to keep it away from people. Intresting.
Check to see if I can reasonably travel to the location from the jungle in three days. Disregard if Violin can fly.