This is the poem hung on the walls in everyone's rooms. The guests and staff's deaths are based upon this poem. It is a reference to the ten figures found on the dining table. Edit
Ten little soldier boys went out to dine; One choked his little self and then there were nine.
Nine little soldier boys stayed up late; One overslept himself and then there was eight.
Eight little soldier boys travelling in Devon; One said he’d stay there and then there were seven.
Seven little soldier boys chopping up sticks; One chopped himself in halves and then there were six.
Six little soldier boys playing with a hive; A bumblebee stung one and then there were five.
Five little soldier boys going in for law; One got in Chancery and then there were four.
Four little soldier boys walking along the sea; A red herring swallowed one and then there were three.
Three little soldier boys going to the zoo; a big bear hugged one and then there were two.
Two little soldier boys sitting in the sun; One got frizzled up and then there was one.
One little soldier boy left all alone; He went and hanged himself and then there were none.