Hi Brissygal,
I've got hooked on this search too.

,
I have seen three children Baptised to a John Penrose (Confectioner) and Mary Ann...St Mary's Truro
All three baptised 21/5/1868 at Kenwyn.
Frederick
Henry
Elizabeth Jane.......no ages given for any of them
I have seen a marriage for a Mary Ann Evans to John Penrose b1825 and a census for 1861/1871 he is a Carpenter and Beer

? so not yours but they also had a child called Charles E so maybe some connection somewhere

Census 1861 RG9 Piece 1558 Folio40 Page 6.
Ambers