Pick up a सिलम्बम् कम्बु and the first thing you learn is that it is not just another random stick.
It has a weight and a balance that a cut length of bamboo does not have. It is chosen, seasoned specifically — a straight, uniform cane or bamboo of a particular heft, cut, seasoned with oils, designed with fire, and then tested by striking it on the surface of still or running water, because the sound and the recoil tell you what a measurement cannot. The kambu is selected the way a musical instrument is selected.
That single detail tells you what kind of science Silambam is. Arts that grow up casually do not develop a test for choosing the implement. Arts with a shaastra (शास्त्र) behind them do.
Silambam is the Chola-Pandya stream of Dhanurveda as expounded by Agastya and his disciples based on the classical Vel of Vel-Murugan Karthikeya Swami. Not random lessons spread here and there but a continuous knowledge system that spans vast expanses of time, that is continuously exchanging with vast lands that the Chol/Pandya vansh rules but still so unique, having a thousand different styles as per different Gurus (Asans) and communities but still so coherently singular, practical & functional moves but still transcedental at the same time, it is not a gimmick or a one-off invention, it is a continuous Parampara, one of the most beautiful expressions of the same river that is the science of Dhanurved.

In Thiruvilayadal Puranam, Paranjothi Munivar describes not just the art of Silambam but the building it was practised in — the सिलम्बकूडम्. The similar institution turns up across Bharat under different names: the गरडि माने of Karnataka and गरडि कूडम् or कर्रा सामु of Andhra, the कलरि of Kerala — of which the plainest gloss available is "kalari means silambakoodam" — and, in the north and west, various names for the arts and the अखाड़ा such as Paika Akhada in Orissa, Mardani Khel of Maharashtra, Lathi Khel of Bengal. One institution. Several names. The names differ because languages differ, the styles differ at different places or times or Guru Parampara; the central thing does not.
In Maharashtra state, staff fencing is popularly known as 'Lathi', whereas the same is called 'Dhal Lakadi' in Gujarat region, 'Karra Saamu' in Andhra, 'Lati Lakadi' in Bengal region, 'Dhanta Varisai' in Mysore, 'Nedu vadi' [in] Kerala, and Silambam in Tamil Nadu.— Dr. David Manvel Raj, quoted in A. Arunachalam, Silambam Several names, several styles, one art, running from the Himalaya to Kanyakumari. However, exemplary is the kind of variety, expertise and respect given to the long staff (Nedu Kambu) in Silambam, in the region where the regional Ishta Deva Vel Murugan Swamy himself holds Vel (spear) as the primary weapon. It is distinct, and it is likely the most vast among the Dhanurveda arts practised today. And it is regional only in the way that a river is regional at the point where you happen to be standing on its bank. That lineage is not claimed loosely. The principal Rishis of Dhanurveda are named as विश्वामित्र, वसिष्ठ, जमदग्नि and his son परशुराम, अगस्त्य, and भरद्वाज — from whose line comes द्रोण. Of these, it is अगस्त्य and परशुराम who worked in the Dakshin, and it is मुरुगन्, Mahadev's own son, who is remembered as the guru and great practitioner of Silambam.
The अग्निपुराण's chapter on the लगुड — the staff, the लाठी — gives the killing strike in two verses:
करेणादाय लगुडं दक्षिणाङ्गुलकं नवम् । उद्याम्यघातयेद् यस्य नाशस्तेन शिशोर्दृढम् ॥ ११ ॥ उभाभ्यां सहस्ताभ्यां कुर्यात् तस्य निपातनम् ॥ १२ ॥— अग्निपुराण २५१.११-१२ Take up the staff in the fingers of the right hand, उद्याम्य — raise it — and strike. Then, in the very next verse, उभाभ्यां सहस्ताभ्याम् — with both hands together. On a Silambam floor that first strike has a name. It is वेट्टु, the hard hit; and when it lands where it is aimed, तलै-वेट्टु, the head strike. It is the most important strike in the art. लगुड अर्थात् दण्ड / लाठी — यही आयुध भारतीय अखाड़ों का प्राण है। हमारे Silambam Kambu (लम्बा दण्ड) और Karlakattai (भारतीय मुद्गर-दण्ड) इसी लगुड-विद्या की जीवित शाखाएँ हैं। The correspondence is not limited to one strike. The अग्निपुराण also gives the कर्म of the लगुड — संभ्रान्त, विश्रान्त, गोविसर्ग, सुदुर्धर — and fixes the stances by measurement: मण्डल, where the feet stand four वितस्ति apart; वैशाख, the working stance a practitioner holds while turning sutrus; and, most used of all, आलीढ, which our own practice calls वन्डी निलै.
In the Silambam conditioning drills — उक्कि, the squat; तुल्लु, the springing; and करला, club rotation — the club appears before the weapons section begins, which opens with the long staff, the नेडु कम्बु, named the mother instrument of the art. And the word used for the club is करला, which is where