[6.] könnte (conditional subjunctive), for conditional würde . . . können.
[7.] dem, with emphasis. Why? Cf. [page 5, note 2].
Page 16.—
[1.] die (with emphasis) = diese, or sie. How known that it is not relative?
[2.] fort, the infinitive of a verb of motion, as gehen, being implied.
[3.] drum (colloq. for darum´), about (it) them; drum herum´, round about (them).
[4.] hinaus´, the perf. partic. of a verb of motion, as gegangen, gesprungen, geeilt, etc., being implied.
[5.] es lag ihr die Sorge auf dem Herzen, „es“ being the introductory and grammatical subject, while the logical subject („die Sorge“) follows after the verb = die Sorge lag ihr auf dem Herzen.
[6.] daran´—refers back to the preceding—from doing so.