The Ancestry records for Heath are rather confused. If you go to the page for Derbyshire Baptisms, Marriages and Burials 1538-1812 and select Heath from the options for browsing the images you are presented with two sets, covering 1682-1812 and 1712-1760. Only the first should be there, the other is actually a Chesterfield register. The first has the image you want (image 44), the second of course doesn't.
They have also indexed an old transcript of that register which is correctly assigned to Chesterfield, so if you search for an event that happened at Chesterfield in that period (1712-1760) you'll get two hits, one claiming Heath and one Chesterfield (provided they've transcribed the name correctly in both cases).
Richard's mother is Merina, not Maria.
David