Conical Embeddings of Steiner systems

Any classicalS(3,2a+1;2ab+1) is embedded intoPG(2,2ab) as point set one may use any conic, the blocks being determined by subplanes of order 2a. Consequently, every classicalS(3,2a+1;2ab+1) is naturally embedded intoPG(2,K) whereK is the algebraic closure ofGF(2).