I saw your posting on Genforum.com
Here is a little history of the Linthicum's of Washington, D.C.
The following information came from the book:
Genealogy of the Linthicum and Allied Families. Matilda P. Badger, 1934. Baltimore, Maryland. (page 36)
"John Linthicum, born 1770 in Maryland, married Priscilla Magruder.
They had children:
1. Edward Linthicum
2. Otho Linthicum
3. Rufus Linthicum, Sr
Edward and Otho founded the Linthicum Institute in Washington, D.C.
One was a druggist, the other was a hardware man.
Matilda's book states that Rufus Linthicum was born about 1810 in Virginia. He died 1864 in Bardstown, Kentucky.
In 1827, when he was 17, he married Eliza Anthony.
They had children:
a. Dr. Daniel Anthony Linthicum
b. William Linthicum
c. Rufus Linthicum, Jr
d. Susan Linthicum
Rufus married 2nd to Mrs. Sarah Vermillion.
they had children:
Dr. Edward, of Evansville, Indiana, was knighted by German Emperor for distinguished services in the Balkins.
Now this is the research I tried to find for you:
I tried for several hours looking for your L. M. Linthicum and was disappointed that I could not find him for you. However, you mentioned a Linthicum family of Georgetown, Washington, D.C. and I started my search there.
Edward and Otho Linthicum both had the middle initial M. In researching the Linthicums I have found that many times the sons take on the middle name of their mother's maiden name. I have a hunch, but it is only that... a hunch, that Edward and Otho Linthicum's middle name was Magruder, after their mother Priscilla Magruder. I wondered ifyour Linthicums descended from the Georgetown Linthicums that perhaps the middle initial stood for Magruder. Then I found something that seemed to strengthen this theory:
Ancestry.com has a Washington D.C. marriage listed for:
Dr. Otto Magruder Linthicum married September 4, 1823 to Ann E. Magruder in the District of Columbia, Washington County.
If that information is correct, I wouldn't be surprised if Otto and Ann were cousins. Some of the earlier Linthicums married their cousins.
I found something curious:
An Otho M. Linthicum was in Georgetown by 1812, when he was a private in the 1st Regiment of the District of Columbia Militia in the War of 1812 (Box 126, Roll 602). This seems too early for the Otho Magruder Linthicum who was married in 1823 and who was listed as age 50 with his wife Ann in the 1850 census, which would put his date of birth around 1800. (Unless his age in the census was off? or it was a different Otho M. Linthicum?
Both Otho M. and Edward M. were found living in Georgetown, Washington D.C. by the 1830 Census.
Edward M. Linthicum was listed on page 170 and Otho M. Linthicum was listed on page 172, both living near each other in Georgetown.
I looked in the 1850 Census and found Otho M. Linthicum and Edward M. Linthicum. Otto's occupation was listed as an Apothecary and Edward M. Linthicum was listed as a Merchant. Now we know the answer to Matilda Badger's book; Otto was the "druggist" and Edward was probably the "hardware Man".
Both were old enough to possibly have had sons who were no longer living with them by 1850.
August 12, 1850
Page 170 A
The North West Ward of Georgetown, Washington, District of Columbia
Lines 34 - 38
Otho M. Linthicum, age 50, male white, Occupation Apothecary, Value Real Estate 10,000 - Born Maryland
Ann E. Linthicum, age 43, female white, Born Maryland
May Linthicum, age 14, female white, Born Georgetown
Emily Linthicum, age 11, female white, born Georgetown
Annette Linthicum, age 7, female white, born Georgetown
December 30, 1850
West of 7th Street Turnpike, Washington, District of Columbia
Lines 22 - 28
Edward M. Linthicum, age 50, male white, Occupation Merchant, value real estate 35,000
Mary A. Linthicum, age 40, female white
Maly Turner, age 35, female white
Kate Linthicum, age 17, female white, attending school
George Golding, age 28, male white,Occupation Coachman
Mary Golding, age 20, female white
Anna Golding, age 2, female white
(census states ALL were born in Maryland)
Edward Linthicum was still been living in June 1860. He was found in the census as well as in the slave schedule.
June 11, 1860
First Division, Tenleytown Post Office, Washington D.C.
Series: M653Roll: 103
Lines 27 - 34
Edward Linthicum, age 69, male white, Merchant, Value Real Estate 50,000 - Value Personal Estate 6,000, born in Maryland
Mary Linthicum, age 50, female white, born in Marland
Kate Linthicum, age 23, female white, born in Maryland
George Golden, age 40, male white, Coachman, born in Maryland
Dilia Golden, age 30, female white, Housekeeper, born in Maryland
George Golden, age 9, male white, attending school, born in D.C.
Jenny Golden, age 5, female white, born in D.C.
Elizabeth Golden, age 2, female white, born D.C.
1860 Slave Schedule
June 12, 1860
Division 1, Washington, District of Columbia
Lines 35 - 38
Edward Linthicum(owned 4 slaves)
1 black female, age 33
1 black female, age 25
1 black female, age 18
1 black female, age 15
Perhaps Otho died between the 1850 - 1860 census.
Ann E. Linthicum is listed as A. E. Linthicum with Emily and Annette.
June 22, 1860
Series: M653Roll: 101
Ward 4, Georgetown, Washington, District of Columbia
Lines 1 - 3
A. E. Linthicum, age 59, white female, Value Personal Estate 411, Born in Maryland
Emily Linthicum, age 19, white female, born District of Columbia
Anette Linthicum, age 16, white female, born District of Columbia
Perhaps Edward M. Linthicum died between the 1860 and 1870 Census because Mary is listed in the 1870 census. (This one was a little hard to read)
July 7, 1870
Series: M593Roll: 127
Lines 10 - 13
Mary Linthicum, age 62, female white, Keeping House, Value Real Estate 200,000 - Value Personal Estate 50,000, born Maryland
Josiah Dent, age 52, male white, Lawyer, Value Real Estate 25,000 - Value Personal Estate
Edward L. (no last name listed... Dent?), age unclear, maybe 9, or 11?, attending school, born Washington D.C.
Eliza Quinn, age 37, female white, House Servant, born in Ireland
Don't know if this George is related to the Otho or Edward Lintihcum families of Georgetown?
June 7, 1870
Series: M593Roll: 127
Page: 516 B
Georgetown Post Office
Washington, District of Columbia
Lines 23 - 28
George Linthicum, age 30, male white, Works on Mill, Born in Maryland
Kate Linthicum, age 28, female white, Keeping House, born Maryland
Eleanor Linthicum, age 9, female white, attends school, born in Maryland
Cora Linthicum, age 7, female white, attends school, born in Marland
Edwin Linthicum, age 5, male, white, born in Maryland
I hope some of this is of some help. I wish I could have found something on your L.M. Linthicum, but at least this gives a little history about the Linthicum families of Georgetown in Washington, D.C.
The only L. Linthicum I could find in Virginia was a Lafayette Linthicum. I don't know if or how he would fit in to the Georgetown Linthicum families.
Take care and good luck with your research,
A Linthicum descendant of Anne Arundel County, Marylandin the 1600s, to Kentucky in the 1800s and back to Maryland by 1854.
Descendant through my maternal grandmother.