The instrument/parts list for Collosus notes that Player V needs a low-E marimba. This is also reflected in the Suggested Setup diagram.

However, it is actually Player VI that needs the low E marimba (see Rehearsal H). The "low E" text in the Instrument/Parts list needs to move from Player V to Player VI. The "Player V" and "Player VI" labels in the Suggested Setup diagram need to swap.

Thanks Joe. We'll get this updated for our next printing. As always, appreciate your sense of detail!