[These tracings appear to have been separated and trimmed from an original single sheet, both tracings having apparently sometime been pinned to the backing sheet.]

Data (tracing); by Charles Robert Darwin; with See item 22 backing sheet, unannotated, on reverse of part of printed petition 'Declaration against war' Figure; by Charles Robert Darwin in with backing sheet, blank, on reverse of part of printed petition 'Declaration against war' '22 and 23 are indeed related, being the tracings taken on the same days from the 'left-hand' and 'right-hand' of a pair of plants whose movements Darwin was presumably comparing. The two pieces were apparently originally a single large sheet' - per NWG (email of 9/26/17) The originally separate records for "209.7: 22" and "209.7: 23" are indeed correctly combined into a single parent called "209.7: 22-23... - per NWG (email of 10/10/2017).