I spent five years doing a daily poetry progamme for NPR stations in America - 1250 in all - and have a bookcase full of obscure poets but had never heard of 1d. Not HH (Saki) but John, I think, whose only major poem (Our Land) is in Gaelic ... strangely at the same time I was listening to Building a Library on Ma Vlast ...
16a is one word but missing an apostrophe.
I agree 12 is very Pauline - and 19 has a smack ...