Do you know what this typeface is, used in the 'The songs the letters sing' series? It bears similarities to a face called Richmond Old Style which appears in a 1925 specimen by the Blackfriars type foundry. The single-storey a's and g's seem to have been specially drawn.
Do you know anything about the Grant Educational Company? We know they were based in Scotland, and published the well-known 'The songs the letters sing' series.