harris discovered a corrrespondence between random walk excursions and random trees whose continuous analog relates a brownian excursion to aldous's concept of a continuum random tree. this idea has been developed and applied in various ways by neveu, le gall and others.i will review these ideas in terms of a forest growth process, originallydevised by aldous to describe the asymptotics of large finite trees, but nowrelated to the structure of a brownian path exposed by sampling at the timesof points of an independent poisson process.reference: chapter 6 of "combinatorial stochastic processes", available viahttp://stat-www.berkeley.edu/users/pitman/bibliog.html