Structure of the Themis family in the proper eccentricity e_p versus proper inclination sin i_p. Every asteroid is represented by a dot. Concentrations of dots indicate up to 7 sub-families. The most prominent one is related to (656) Beagle. The least prominent ones are very dispersed in the proper semimajor axis a_p, due to the Yarkovsky effect. Nevertheless, it is a confirmation of an ongoing collisional cascade.