Mae'r cwcis hyn yn gwbl angenrheidiol ar gyfer weithrediad y wefan.
Rydym yn defnyddio Google Analytics i fesur sut ydych yn defnyddio'r wefan er mwyn i ni ei wella yn seiliedig ar angen defnyddwyr.
Gall y cwcis hyn gael eu gosod gan wefannau trydydd parti a gwneud pethau fel mesur sut rydych yn gwylio fideos YouTube.
Amgueddfa Cymru
23 & 24 Victoria Session - 1860 Rhymney Valley Railway. A Bill For the making, by the Rhymney Railway Company, of a Branch Railway and two Junction Railways, and for regulating the User by them of Parts of other Railways, and for regulating Tolls, and for authorising a Lease of the Rhymney Railway, and for the raising by them of additional Capital; and for other purposes. 28 pages, Printed in black ink on white paper bound together by string.