looking for proof!

[Trees]

I think I have enough evidence if the two birth 's on Family Search are sound to accept that the cousins have married but where and when is still a dark secret If they did marry in 1886 as per the 1900 census they were quiet young and waited a long time for the first child.

[Lisa in California]

I don't think this has been mentioned (apologies if it was):
Sailing on the Etruria from Liverpool and arriving New York, New York 13 February 1888:
Joshua Beer, age 22, (cannot read occupation), "last town" Devon.
The person above him also has Devon written down, and he has the same occupation.  The man was John Levering(?), age 29.  I mentioned him, in case there is any connection between the two.  At this point, it doesn't appear that Emily was on board the ship.

[shellyesq]

The 1910 Census says they were married for 21 years, Joshua immigrated in 1887, and Emily immigrated in 1889.  If he immigrated first, that might explain the lack of children earlier.

In a passenger list for the City of Chester from Liverpool to New York, 17 Apr 1886, there is a Joshua Beer, age 21, laborer, from Devon.  It's hard to read where he was going, but it might be Pittsburg.

[Lisa in California]

This may be more than you want, since it isn't about your couple, but sometimes checking other facts helps in the end:
Newark, Essex County, NY: Edmund Down and Ellen Loosemoore had a son, William J Down, 17 October 1895.  Both parents were born in England.  William was age 25, Ellen was age 24.

1910 Newark Ward 8 census:
Edmund L Down and Ellen L Down (with family).  Edmund immigrated 1888.  Ellen immigrated 1892.  Edmund was a Motorman, Street Car.

Did Emily have a sister named Ellen?

[Trees]

Brilliant thank you both now my Joshua was b 1866 in Atherington Devon so either could be right
Is it possible he went over and came back for her? was there a Emily Beer or Loosemore on the 1888 ship?

[Trees]

Gracious Lisa there are DOWNS in the same family have you hit on something here I need to check the DOWN connections

[shellyesq]

There is an Emily Loosemore, age 20, sailing on the Gallia from Liverpool to New York, arriving 3 May 1889.  She was a servant, and it looks like her last legal residence was Liverpool.

[Trees]

Was Ellen LOOSEMOREb  about 1871? If so she is sister to Emily

[Trees]

I'll check the 1881 census for where my Emily and Ellen were

1881 Ellen still with parents in Devon Emily a servant in Bishops Tawton so neither near liverpool