Original sentence: It previously had 2 primary schools, which have been closed,1 school residing on the long road up to overtoun house and 1 on the main strech of road to glasgow,it is unknown when this second school (on route to overtoun)was in use or when it closed, presumeably in the late 1800s or early 1900s as it is quite an old building and matches this period
Edited sentence: It is unknown when this second school (on the route to Overtoun) was in use or when it closed, though this was presumeably in the late 1800s or early 1900s, as it is quite an old building and matches this period.It previously had two primary schools, now closed, one on the long road up to Overtoun house and one on the main strech of road to Glasgow