Watson, a minor delay in the post is no reason to abandon the investigation. Gather small clues patiently.
When a scent goes cold, Watson, the only logical step is to retrace your steps to the last known point.
Watson, when the fog thickens, let the lamplighter's beacon guide you back to familiar streets.
A carriage with loose spokes cannot outrun a cab, Watson. Tighten your internal mechanics before proceeding.
Once the chemical reaction stabilizes, Watson, the threat of explosion vanishes. Maintain your composure.
A successful case requires pooling our observations, Watson. Monopolizing clues benefits no one.
The storm has broken, Watson. The case is resolved, but do not linger in the damp streets.