Hunan a dweud y ddafad wrth y mynach.

"Self," said the sheep to the monk.

Dyma oedd motto Rhian bob amser.

This was always Rhian's motto.

Roedd hi'n sefyll gyda'i ffrindiau, Dafydd a Cerys, ar lethr bryn.

She was standing with her friends, Dafydd and Cerys, on the slope of a hill.

Islaw, roedd Abaty Valle Crucis yn cysgu.

Below, Valle Crucis Abbey lay sleeping.

Byth ers y plentyn, bu son am drysor cudd yma.

Ever since childhood, there had been talk of hidden treasure here.

Roedd hi'n brynhawn o ddiwedd yr haf, y coed yn dechrau newid lliw, a'r haul yn disgleirio wrth iddi fynd heibio'r cymylau.

It was a late summer afternoon, the trees beginning to change color, and the sun was shining as it passed through the clouds.

"Rydyn ni angen dod o hyd i'r trysor hwn," meddai Rhian, yn herio'i ffrindiau.

"We need to find this treasure," Rhian said, challenging her friends.

Roedd hi'n awyddus i ddarganfod rhywbeth i wneud iddi deimlo'n bwysig.

She was eager to find something to make her feel important.

"Ond mae'n peryglus," rhybuddiodd Dafydd.

"But it's dangerous," warned Dafydd.

Roedd ei ochrau ffyddlon bob amser yn amgylcheddol o ymdrechion Rhian i fynd y tu hwnt.

His faithful sides were always wary of Rhian's efforts to go beyond.

Ond roedd e'n deall arwyddocâd yr antur i Rhian.

But he understood the significance of the adventure to Rhian.

"Mae'r straeon yn dweud bod y drysor wedi ei guddio o dan adfeilion yr abaty," ychwanegodd Cerys gyda gwen yn llawn cyffro, yn awchu am unrhyw le i dywys ei dychymyg liar ynnigo.

"The stories say the treasure is hidden under the ruins of the abbey," Cerys added with a grin full of excitement, eager for any place to guide her wandering imagination.

Fe ffrëgodd y tri ffrind drwy'r gerddi, yn treiddio i wreiddiau tywyll y strwythur.

The three friends crept through the gardens, delving into the dark roots of the structure.

Roedd yr aer yn swynol o lawr môs a hanes, a'r to'n ddieithriad i'r haul roeddent wedi adael tu cefn.

The air was enchantingly fragrant with moss and history, and the roof, a mystery they had left behind.

Dewisodd Rhian arwain y ffordd tuag at adran oedd wedi ei dynodi gyda rhybuddion.

Rhian chose to lead the way to an area marked with warnings.

Roedd llythrennau coch yn rhybuddio nad i fynd ymlaen.

Red letters cautioned them not to proceed.

"Os nad ni, pwy bynnag?

"If not us, then who?"

" fe holodd Cerys yn chwilfrydig.

Cerys asked curiously.

Argaeledd o adeiladau sydd ar gael ar wasgar, a'r Drych Mawr a chafn i lawr, dywedodd chyfnewid eich dycniau i ddod o hyd i gamlera gudd, a dan do cafodd y tri anniddig gwrdd â fyddai'n golygu mwy o reibe: Tiwbiau rholio, hen lenni, a dwylo mewn chwarel dda o wybodaeth.

Availability of buildings scattered about, and the Great Glass and trough down, instructed your perseverance to find hidden chambers, and under the roof, the uneasy trio met what would mean more chapters: Rolled tubes, old sheets, and hands in a quarry rich in information.

Roedd y papurau yn berthnasol i'r gweithgareddau hanesyddol yn yr abatyau.

The papers were related to historical activities in the abbeys.

Lennodd llygod gafalog wedi'i ddryllio ar gwaplien dram y iaith.

Shattered scrolls adorned the path of the language.

Roedd Rhian yn dychwelyd arni heb drysor, ond roedd y teimlad cyfan yn ei ewyllys yn ei gadarnhau.

Rhian returned from it without treasure, but the feeling of her entire will fortified her.

Gwnaeth y dystiolaeth sylweddol a chael ffotograff lledol iddo ei rhoi i'r oriel leol.

The substantial evidence gathered and a photograph allowed her to contribute to the local gallery.

Er nad oedd Rhian wedi darganfod trysor aur fel roedd hi'n ddymuno'n gyntaf, roedd y parch a'r gwerthfawrogiad a gafodd oddi wrth ei ffrindiau a'r gymuned yn ddigon.

Although Rhian had not discovered gold treasure as she initially wished, the respect and appreciation she received from her friends and the community were enough.

Ar ddiwedd y dydd, roedd yr hyn roedd hi wir eisiau wedi bod yno yn y cyfrinachau cudd hynny - nid aur, ond yn hytrach, hanes.

At the end of the day, what she truly wanted had been there in those hidden secrets—not gold, but rather, history.

Dyma oedd neges Valle Crucis ar y diwrnod hwnnw, bod gwir glod yn aml yn cuddio mewn mannau lle mae chwilio yn fwy pwysig nag adnoddau.

This was the message of Valle Crucis on that day, that true glory often hides in places where searching is more important than resources.

Roedd Rhian yn gwybod nawr, gyda Cerys a Dafydd wrth ei ymyl, ei dyn a'i ddadleu i ennill rydym ein lle ein hunain.

Rhian now knew, with Cerys and Dafydd by her side, her determination and arguments would earn them their own place.