The following is an extract from 窓際のトットちゃん.
Interestingly, jisho.org doesn't seem to have an entry for 持たす but other dictionaries like goo, do.
I understand that it's used only in a literary context. Even so, is it considered less acceptable in a literary context now than it was earlier? Or is it just a case of jisho.org not carrying this word?