This is the most I can come up with.
Lawn & Alder Ltd
Brackley Street, Golden Lane
Cross Street and Kirby Street, Hatton Garden
The firm sold shotgun cartridges under the name "The L & A".
As others have said, they appear to be retailers that operated around 1900.
The appear to have specialized in supplying various trips and expeditions.
From one of their ads:
Whether you reside in the Arctic or the Antarctic, the Temperate or the Torrid Zones, your shopping difficulties can be solved by the House of Lawn and Alder. No matter what your need may be, a tropical suit, household goods, a silver trophy or...
They supplied Fredrick Selous in 1908.
Pete
