Same scenario and objects as observed 24 hours before (Reference report Case Number 71229 submitted on 10/07/2015). Lights appeared in a cluster in western sky then, one by one moved northward and then southward over our position. It is possible that objects were drones operated from either of two nearby locations:1. Martin State Airport (Site of Maryland Air National Guard Unit).2. Aberdeen Proving Ground (Located northeast of this location). Objects were noted to be traveling south, not north.If they were drones however, that doesn't explain the SUDDEN appearance of objects as they joined the cluster before moving northward. That's the mysterious part of these observations.All of the objects moved very slowly and were very quiet when passing overhead, much quieter than even a small private single-engine aircraft. This location is nearby frequent flybys of military aircraft which are unmistakable by their very loud noise and physical profile. Witnesses were my wife Chris and myself as identified in the previous case report.