I also thought maybe 242 If you go to FreeBDM and do a search Jun 1847 and Redruth and 9 242 but NO names you will get 6 hits If you do the same with 342 there are NO finds.
FreeBDM has a list of valid page ranges For 1847 Jun, Volume 9 Redruth the valid page ranges are given as Jun 9 227-277 Redruth (to 1974) 1,6 2 398
This is probable range 227 to 277 1 birth before the range 6 births after the range 2 pages missing in the range total number of births 398
On the FreeBDM search page, go to advanced facilities and then page ranges