स्वभूमिष्ठानामन्यतमस्य पण्यागारैरभिज्ञातान्दूतमुख्यानभीक्ष्णं प्रेषयेत् ॥ कZ_०९.६.६५ ॥
svabhūmiṣṭhānām anyatamasya paṇyāgārair abhijñātān dūtamukhyān abhīkṣṇaṃ preṣayet
To one among those entrenched in his own territory, he should repeatedly dispatch principal envoys who are known/recognised through trading-houses (commercial depots and merchant networks).
Merchant networks provide local legitimacy, access, and identity verification; envoys known through them can circulate with lower suspicion and collect/shape information while sustaining pressure through repeated engagement.