We give a bound on the reconstructibility of an action G  X in terms of the reconstructibility of a the action N  X, where N is a normal subgroup of G, and the reconstructibility of the quotient G/N. We also show that if the action G  X is locally finite, in the sense that every point is either in an orbit by itself or has finite stabilizer, then the reconstructibility of G  X is at most the reconstructibility of G. Finally, we give some applications to geometric reconstruction problems. Key words. Insert your keywords here. 							
						
							
					 															
					A. J. Radcliffe, Alex D. Scott