nach

• Prep

  1. after, past (later in time)
  2. after, behind (in sequence)
  3. to, towards (with geographical names; see usage notes below)
  4. according to; guided by
  5. by the authority of; following
  6. like (see usage notes below)
  7. for (indicating desire for an object)

• Postp
• Adv

seiner

• Pron

  his (substantival possessive)

• Det

Reise

1. journey, travel
2. trip (on drugs)

sammelte

1. inflection of sammeln:
2. inflection of sammeln:

er

1. he.
2. it (when the grammatical gender of the object/article/thing/animal etc., being referred to, is masculine (der)).
3. she (when the grammatical gender of the noun being referred to and designating a female person, is masculine (der)).
4. Alternative spelling of Er (you (polite))

Schüler

1. pupil, student, schoolboy (male or of unspecified gender)
2. disciple (male or of unspecified gender)

mehrere

multiple, several; more than one; a number of

Bücher

nominative/accusative/genitive plural of Buch