Projects on which Lennartz worked

• Charles W. Sexton summer residence, alterations (Lake Minnetonka, Minnesota 1910)
• Alexander Brothers, Factory for the International Leather & Belting Corporation (New Haven, Connecticut 1917)
• Charles O. Alexander summer residence, alterations (Squam Lake, New Hampshire 1919)

References

• Mention of Donaldson in a Northwest Architect article, by William Gray Purcell
• Reference by Purcell in his autobiographical "Review of Gebhard Thesis," William Gray Purcell - Part IV. concerning Lennartz work on the Heitman house, and other jobs.

research courtesy mark hammons