alk ▁grass land ▁situated ▁on ▁a ▁north - f acing ▁sc arp ▁slope ▁to ▁the ▁south ▁of ▁Bur com be ▁in ▁W ilt shire , ▁England . ▁Because ▁of ▁its ▁species - rich ▁plant ▁communities , ▁an ▁area ▁of ▁ ▁of ▁the ▁Down ▁has ▁been ▁not ified ▁as ▁a ▁bi ological ▁Site ▁of ▁Special ▁Scient ific ▁Interest , ▁notification ▁originally ▁taking ▁place ▁in ▁ 1 9 7 1 . ▁ ▁S ources ▁▁ ▁English ▁Nature ▁c itation ▁sheet ▁for ▁the ▁site ▁( access ed ▁ 8 ▁August ▁ 2 0 0 6 ) ▁ ▁External ▁links ▁ ▁English ▁Nature ▁website ▁( SS SI ▁information ) ▁ ▁Category : S ites ▁of ▁Special ▁Scient ific ▁Interest ▁in ▁W ilt shire ▁Category : S ites ▁of ▁Special ▁Scient ific ▁Interest ▁not ified ▁in ▁ 1 9 7 1 ▁Category : H ills ▁of ▁W ilt shire <0x0A> </s> ▁The ▁Vil ay et ▁of ▁the ▁Dan ube ▁or ▁Dan ub ian ▁Vil ay et ▁( ; ▁, ▁Dun av ska ( ta ) ▁ob last , ▁more ▁commonly ▁Ду на в ски ▁ви ла ет ▁( Dan ube ▁Vil ay et ); ▁) ▁was ▁a ▁first - level ▁administrative ▁division ▁( vil ay et ) ▁of ▁the ▁Ott oman ▁Empire ▁from ▁ 1 8 6 4 ▁to ▁ 1 8 7 8 . ▁In ▁the ▁late ▁ 1 9 th ▁century ▁it ▁reported ly ▁had ▁an ▁area ▁of ▁. ▁ ▁The ▁vil ay et ▁was ▁created ▁from ▁the ▁northern ▁parts ▁of ▁Sil istra ▁Province ▁along ▁the