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Mas’ala 1843المهذبShafi'ivol. 4, p. 256vol. 4, p. 256

وَإِنْ كَانَ فِي الْجُمُعَةِ قَالَ الشَّافِعِيُّ رَحِمَهُ اللَّهُ فِي الْأُمِّ إنْ تَمَّ الْعَدَدُ بِهِ لَمْ تَصِحَّ الْجُمُعَةُ لِأَنَّهُ فَقَدَ شَرْطَهَا

Its commentaries

المجموع شرح المهذبal-Nawawi

its words on this mas’ala come with mas’ala 1839 before it

A number in a circle: a mas’ala the commentary adds, numbered through it. In bold: the text’s own words inside the commentary.