Here are some more pictures. The Jeffrey was used along the US-Mexican border in 1916-17 but did not cross it with Pershing. Some went to Canada and quite a few ended up in India. The were also aqdvertised in the Netherlands along with the other Quads during WW 1. I do not know if any were ever sold there. The first picture is in this tread is actualy a reproduction made by Vintage Aviation in Texas and is on display there outside the museum in Columbus New Mexico. The black and white picture was taken in 1916 in Columbus NM during the puntive expedition.
You should always use anti-freeze (50/50 DISTILED water) even in area's where it normaly does not freeze. The anti-freeze helps in heat transfer and better cooling