Research services at the Maryland Historical Society Museum and Library in Baltimore consists of many offerings as shown on their website. A guide to their offerings from their website: http://www.mdhs.org/library/collections-overview
They are also a great source of Baltimore City Directories that are not available online.
Retainer upfront; Balance due on completion
It would be best to contact me via the messaging at username rankenbauer so that we can estimate the amount of research needed.
or
Place your order for the amount of hours you would like us to conduct research, being as specific as possible with regards to names, date of births, deaths, marriage, divorce.