Search (upper right hand corner) sanborn maps.
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Under Select a State: Maryland.
Select a City: Baltimore [Baltimore Co.]
Select a date: 1928-1936
Select a volume: Vol. 5A 1936
Click on Key, Sheet Oa (click on download map at top = big map for context, you will have to zone and find your spot on the map) Sanborn 1936 general
Spots of interest:
520 Filbert Street Garden
541/542 Wagner’s Point
545 Sledd’s Point
546 Hawkins Point (community)
Look around in 1914-1953 as well under 5A