I read it as the not valid cookery section, but it seems it's for the infirmed.

Service for a Invalid

"To make Toast Sandwiches toast a very thin slice of bread and put it between two thin slices of bread, spread with butter and a very little marmite"

(1938) - https://nla.gov.au/nla.obj-502488403/view?sectionId=nla.obj-...

Do you butter both sides?