There is a death index in March quarter 1847, Woburn RD ref 6/100 of Sophia Pentelow. Woburn RD includes Toddington. However the NBI does not record this. Deano have you sent off for the death certificate ? Have you checked the burials in the parish records? Have you checked the Toddington MI's available from Beds FHS.
I think she is the one aged 60 found in Toddingon in 1841, living with James & Sophia Smith, & we know that a James Smith of Olney married Sophia Pentalow at Higham Ferrers in 1834 & that Sophia Smith b 1810 Higham Ferrers is on 1851 census. Have you been to Beds Archives to see will of James Smith, baker of Toddington ref 1848/4
Where/When is the other location of the other whoever ?
Can you be more specific rather than just generic/cryptic ?