Old Roughs/practice sketch collage

I am an inveterate destroyer of practice/ unpublished rough sketches except in fairly rare cases when either the 'rough' is/was good enough to incorporate in a finished work', or I just liked the drawing enough to keep it as a template for future stuff.

This is an A4 collage of such 'survivals'... in this instance, all with quickly added brushed coloured inks.

LEGEND... From top left 1) Line practice c2000 - Marker  2) Character rough c1983 - Sharpie  3) Character rough  c 2001 - Marker  4) Pen test c1980s - cartridge pen  5) Caricature rough c1980s -  Marker  6)  Character(dog) rough c1970's Brush   7 & 8) caricature roughs c1990s   9) Caricature rough c mid 1970s - Brush.