It seems that Kāyastha had almost a monopoly of sort over office of Sāndhivigrahin i.e. Minister of War and Peace.
The Dasapalla grant of Devānanda II (11 century AD) records gifting of village to Kāyastha Yaśodatta who was a Sāndhivigrahika and is said to be a śāstropādhyāya.
Charter of Narasapalm plates of Vajrahasta (1055 AD) which records grant of land to Vajrahasta III relative were written by Kāyastha Dhavala,a Sandhivigrahin.
Another plate of King Vajrahasta III which records grant of village to a vaisya were written by Dāmodara who introduces himself as son of Māvura,Sandhivigrahin and mahā Kāyastha.
In Bhinmal Stone inscription of Udaysimhadeva VS 1306, we find reference to two sons of Thakkura Udaysimha of Mathur subcaste.The two brothers donated to treasure of Jagatswamin, Surya Divinity of Bhinmal.
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The same diety has been referred to as Kuldevta of Narapati ,kayastha minister of Hammira of Ranthambore in inscriptions of Hammira era.