diff --git a/src/rntuple.cpp b/src/rntuple.cpp
index 991f0b7..a644254 100644
--- a/src/rntuple.cpp
+++ b/src/rntuple.cpp
@@ -112,7 +112,6 @@ void gather_metadata(Arena *arena, RMicroFileReader &reader, const RNTuple_File_
           last_inserted_pinfo->next = pinfo;
         } else for (Page_Info_Node *node = pinfo_head->next, *prev = pinfo_head; node; prev = node, node = node->next) {
           if (pinfo->range.end() <= node->range.start) {
-            printf("inserted 0x%lX - 0x%lX (previous was 0x%lX - 0x%lX)\n", pinfo->range.start, pinfo->range.end(), last_inserted_pinfo->range.start, last_inserted_pinfo->range.end());
             prev->next = pinfo;
             pinfo->next = node;
             ++n_slow;
@@ -158,14 +157,12 @@ void gather_metadata(Arena *arena, RMicroFileReader &reader, const RNTuple_File_
       // close current chunk and open new one
       Page_Info_Chunk *chunk = arena_push<Page_Info_Chunk>(arena);
       chunk->range.start = pinfo->range.start;
-      chunk->first_group = n_groups;
-      printf("closing chunk 0x%lX - 0x%lX, opening new at 0x%0lX\n", chunks_tail->range.start, chunks_tail->range.end(), pinfo->range.start);
+      chunk->first_group = n_groups - 1;
       chunks_tail->next = chunk;
       chunks_tail = chunk;
       ++n_chunks;
     }
     chunks_tail->range.len += pinfo->range.len;
-    printf("adding page 0x%lX - 0x%lX to chunk 0x%lX - 0x%lX\n", pinfo->range.start, pinfo->range.end(), chunks_tail->range.start, chunks_tail->range.end());
 
     if (idx++ % GROUP_SIZE != 0)
       continue;