diff --git a/logtools/log/base.py b/logtools/log/base.py
index a25b51f..821c5c4 100644
--- a/logtools/log/base.py
+++ b/logtools/log/base.py
@@ -18,10 +18,10 @@ class LineNumberLocation:
 @dataclass
 class RawLogLine(Generic[TLocation]):
     """
-    A :class:`RawLogLine` is a log line that has not been parsed. It contains the raw text of the line and an optional
-    location when that can be meaningfully established by the input source.
+    A :class:`RawLogLine` is a log line that has not been parsed. It contains the raw text of the line and a
+    location, when that can be meaningfully established by the input source.
     """
-    location: Optional[TLocation]
+    location: TLocation
     raw: str
 
 
diff --git a/logtools/log/sources/input/elastic_search/elastic_search_log_repo.py b/logtools/log/sources/input/elastic_search/elastic_search_log_repo.py
index e0e63b1..b7a2af9 100644
--- a/logtools/log/sources/input/elastic_search/elastic_search_log_repo.py
+++ b/logtools/log/sources/input/elastic_search/elastic_search_log_repo.py
@@ -51,9 +51,9 @@ class ElasticSearchLogRepo:
         }
 
         if prefix is not None:
-            query['aggs']['distinct_namespaces']['terms']['include'] = f'{prefix}.*'
+            query['aggs']['distinct_namespaces']['terms']['include'] = f'{prefix}.*'  # type: ignore
 
-        result = self.client.search(index=self.indices, body=query)
+        result = self.client.search(index=self.indices, body=query)  # type: ignore
 
         for namespace in result['aggregations']['distinct_namespaces']['buckets']:
             yield Namespace(
@@ -78,7 +78,7 @@ class ElasticSearchLogRepo:
         }
 
         if prefix is not None:
-            query['aggs']['distinct_pods']['terms']['include'] = f'{prefix}.*'
+            query['aggs']['distinct_pods']['terms']['include'] = f'{prefix}.*'  # type: ignore
 
         if run_id is not None:
             query['query'] = {
@@ -87,7 +87,8 @@ class ElasticSearchLogRepo:
                 }
             }
 
-        for pod in self.client.search(index=self.indices, body=query)['aggregations']['distinct_pods']['buckets']:
+        for pod in self.client.search(index=self.indices,
+                                      body=query)['aggregations']['distinct_pods']['buckets']:  # type: ignore
             assert len(pod['namespace']['buckets']) == 1, 'Pods should only have one namespace'
             assert len(pod['runid']['buckets']) == 1, 'Pods should only have one run_id'
 
@@ -97,4 +98,3 @@ class ElasticSearchLogRepo:
                 run_id=pod['runid']['buckets'][0]['key'],
                 indices=tuple(sorted(index['key'] for index in pod['indices']['buckets']))
             )
-
diff --git a/logtools/log/sources/input/elastic_search/elastic_search_source.py b/logtools/log/sources/input/elastic_search/elastic_search_source.py
index 11a120d..c9d96a0 100644
--- a/logtools/log/sources/input/elastic_search/elastic_search_source.py
+++ b/logtools/log/sources/input/elastic_search/elastic_search_source.py
@@ -45,7 +45,7 @@ class ElasticSearchSource(LogSource[TimestampedLogLine[ElasticSearchLocation]]):
             for i, document in enumerate(self._run_scan(self._build_query(), index)):
                 yield self._format_log_line(i, index, document)
 
-    def _indices(self) -> List[str]:
+    def _indices(self) -> Iterator[str]:
         # FIXME this is a VERY INEFFICIENT fallback
         if self.start_date is None:
             return [f'{INDEX_PREFIX}-*']
@@ -61,7 +61,7 @@ class ElasticSearchSource(LogSource[TimestampedLogLine[ElasticSearchLocation]]):
             start_day += increment
 
     def _build_query(self) -> Dict[str, Any]:
-        query = {
+        query: Dict[str, Any] = {
             'sort': [{'@timestamp': 'asc'}]
         }
 
@@ -85,7 +85,8 @@ class ElasticSearchSource(LogSource[TimestampedLogLine[ElasticSearchLocation]]):
         return query
 
     def _run_scan(self, query: Dict[str, Any], index: str):
-        initial = self.client.search(index=index, body=query, size=5_000, scroll='2m')
+        # the search type stub does not contain the body argument for some reason so we disable typing here.
+        initial = self.client.search(index=index, body=query, size=5_000, scroll='2m')  # type: ignore
         scroll_id = initial['_scroll_id']
         results = initial
 
@@ -106,7 +107,8 @@ class ElasticSearchSource(LogSource[TimestampedLogLine[ElasticSearchLocation]]):
         contents = document['_source']
 
         return TimestampedLogLine(
-            location=ElasticSearchLocation(index=index, result_number=result_number, run_id=self.run_id,
+            location=ElasticSearchLocation(index=index, result_number=result_number,
+                                           run_id=contents['pod_labels']['runid'],
                                            pod_name=contents['pod_name']),
             timestamp=datetime.fromisoformat(contents['@timestamp']),
             raw=contents['message'],
diff --git a/logtools/log/sources/transform/merged_source.py b/logtools/log/sources/transform/merged_source.py
index 802f58e..229ea66 100644
--- a/logtools/log/sources/transform/merged_source.py
+++ b/logtools/log/sources/transform/merged_source.py
@@ -1,19 +1,19 @@
 from heapq import heapify, heappop, heappush
 from typing import Iterator
 
-from logtools.log.base import LogSource, TLogLine
+from logtools.log.base import LogSource, TimestampedLogLine, TLocation
 from logtools.log.sources.transform.ordered_source import OrderedSource
 
 
-class MergedSource(LogSource[TLogLine]):
-    def __init__(self, *sources: OrderedSource[TLogLine]):
+class MergedSource(LogSource[TimestampedLogLine[TLocation]]):
+    def __init__(self, *sources: OrderedSource[TLocation]):
         self.sources = [source for source in sources if source.peek is not None]
         heapify(self.sources)
 
-    def __iter__(self) -> Iterator[TLogLine]:
+    def __iter__(self) -> Iterator[TimestampedLogLine[TLocation]]:
         return self
 
-    def __next__(self) -> TLogLine:
+    def __next__(self) -> TimestampedLogLine[TLocation]:
         if not self.sources:
             raise StopIteration()