Hi,
Unfortunately I don't think the 1888 GRUNDY/LEES is the right one,
Baptism
01 Jan 1860
Bolton le Moors, St Peter
Peter Grundy LEES
Parents: Henry and Ann
Marriage:
26 May 1888
St George The Martyr, Daubhill
Peter Grundy LEES
28
Bachelor
Joiner
Father: Henry LEES, Joiner
Elizabeth DARBYSHIRE
26
Spinster
Father: Robert DARBYSHIRE, Minder
Also
http://www.lancashirebmd.org.uk/index.php shows the other 1888 Bolton marriage was to Mary KELLY.
Sorry that it doesn't help find the right marriage for Peter, but at least it rules them out.
I agree with BumbleB, it looks like the only way to be sure is by getting a birth cert.
Regards,
Daisy