Wyke drafted a memo to the UK government, with his fears of Mexico's financial collapse and expectation of social dissolution there.
"[2] On 17 July the Mexican congress suspended payment of public bonds for two years, knowing there was the possibility of that triggering foreign intervention to collect debts.
Juárez's Minister of Foreign Relations Manuel María Zamacona had tried to ward off intervention and negotiated with Wyke, since the U.K. was the largest bond holder.
[3] In consequence of the postponement of debt payment, France and England broke off diplomatic relations with the republic on 27 July, and Wyke left Mexico City in December with all his staff, with the failure of the Wyke-Zamacona Agreement.
Wyke remained in Mexico to carry on the negotiations connected with the joint intervention of England, France, and Spain.
When the design of France, however, to subvert the Mexican government became apparent, England and Spain withdrew from the alliance, and Wyke returned home.